meiosis Photos & Videos

9 hours ago

Mitosis is a part of the cell cycle when replicated chromosomes are separated into two new nuclei. Cell division gives rise to genetically identical cells in wich the number of chromosomes is maintained; meiosis is a special type of cell division that reduces the chromosome number by half, creating four haploid cells, each genetically distinct from the parent cell that gave rise to them.........................................La mitosis es un proceso que ocurre en el núcleo de las células eucariótas y que procede inmediatamente a la división celular. Consiste en el reparto equitativo del material hereditario; la meiosis es una forma de reproducción celular que ocurre en las gónadas para la producción de gametos, una célula diploide genera 4 células haploides................................................................................................................................................................... #medical #medicalstudent #medicalschool #medicalaesthetics #medicallife #healthcare #anatomy #science #biology #microbiology #pathology #studygram #mitosis #meiosis #cellcycle #illustration #organelle #bio #cute

190
3 days ago

I set a new personal best on the fluorescent microscope! I present: the nuclei contained in basidia on the gill of Psilocybe cyanescens. I almost started hyperventilating when I saw how well this sample had stained, the contrast and definition of the nuclei was amazing! Nothing so far has taken it up this well. The highlight of the first photo is the center basidia, which contains four bright bodies. These are nuclei, the products of meiosis when the dikaryon completes sexual reproduction. The two nuclei of each parent (previously separate) combine, mix, and then split into four unique daughter nuclei. To sum it up simply. These four nuclei then get pushed to the tip of the basidia and exit in the form of spores. We are looking at spores -before they are spores! These nuclei contain everything that makes the species unique. Those nuclei are what make it a mushroom, and you a human. #fluorescence #microscopy #microscope #thermofisherscientific #nuclei #cells #basidia #fungal #fungi #recombination #meiosis #mushroom #Mushrooms #psilocybe #psilocybecyanescens #cyanescens

415
4 days ago

#flashbackfriday 2018. It’s that time of year already where I’m back teaching the start of the Yr 12 Biology course - Heredity and Cell Replication! 🔬🧬🔬 Can’t wait to get my new Year 12s onto some DNA modelling cause who doesn’t love creating a good stop motion video and playing with pipe cleaners? . . . . . #dna #mitosis #meiosis #cellreplication #celldivision #chromosomes #pipecleaners #dnareplication #playdough #models #modelling #scientificmodelling #sciencemodels #stopmotion #stopmotionvideo #videos #biology #biologyteacher #teacher #teachers #teachersofinstagram #year12 #hsc #hscbiology #fbf #flashback #2018

471
4 days ago

🧬🧬La meiosis🧬🧬 consiste en la división de una célula diploide (2n), es decir, provista de dos conjuntos de cromosomas, en cuatro células haploides (n), o sea, provistas de la mitad de la carga genética de la célula anterior. Estas células haploides operan como semilla de un nuevo individuo, una vez que se fusione con otra proveniente de otro individuo, cada una aportando la mitad de su carga genética. De este modo, la meiosis es un proceso previo a la reproducción sexual, dado que en él se forman los gametos (óvulos y espermatozoides). Meiosis I. Primera división celular de la diploide (2n), conocida como reductiva, pues resulta en células con la mitad de la carga genética (n). Profase I. El primer paso consiste en la preparación del ADN para devenir dos conjuntos distintos, por lo que el material genético se entrecruza y surge en la célula una suerte de línea divisoria. Metafase I. Los cromosomas se ubican en el centro de la célula (ecuador) y empiezan a separarse. La repartición genética al azar ya se ha llevado a cabo. Anafase I. Cada ristra de ADN tiende a un polo de la célula, formando dos polos haploides (n). Telofase I. La membrana plasmática se separa y se da origen a dos células haploides. Meiosis II. Conocida como fase duplicativa, pues se asemeja a la mitosis: se forman dos individuos enteros duplicando el ADN. Profase II. Las células haploides creadas en la meiosis I condensan sus cromosomas y rompen la envoltura nuclear. Metafase II. Al igual que antes, los cromosomas tienden hacia la mitad de la célula, preparándose para una nueva división. Anafase II. El material genético tiende a separarse y migrar hacia los polos de la célula, alistando el nuevo proceso de división celular. Telofase II. Las membranas celulares se separan nuevamente y dan como resultado cuatro células haploides (n), cada uno con una distribución distinta del código genético completo del individuo. #meiosis #division #celular #cel #science #med #medicina #estudiante #medico #doctor

90
5 days ago

نقش پروتئین کوهسین بر کنش و یا واکنش ژنتیکی در اصلاح نژاد اسب از نظر علم ژنتیک اگر ژن از نژاد دیگری به هرعللی وارد ژن اسب از نژاد میزبان شود به مرور زمان مغلوب شده و ژن با درصد بالای پنجاه درصد غالب شده ژن مهاجم توسط پروتئینهای کوهسین تغییر ماهیت میدهد و تعیین نژاد برحسب نژاد غالب تعیین میشود. کوهسین یک مجموعه پروتئینی است که جدایی کروماتیدهای خواهر را هنگام تقسیم سلولی ، یا میتوز یا میوز تنظیم می کند و کروماتیدهای خواهر را پس از تکثیر DNA در کنار هم نگه می دارند تا زمانی که آنافاز هنگام برداشتن کوهسین منجر به جداسازی کروماتیدهای خواهر شود. کروماتیدهای خواهر دو کپی مشابه از یک کروماتید هستند که توسط یک سانترومر به یکدیگر متصل شده‌اند ولی کروموزم‌های هومولوگ که دو کپی متفاوت از یک کروماتید هستند و از هر والد یک رشته به ارث می‌برند. به عبارت دیگر کروماتیدهای خواهر شامل ژن‌ها و الل‌های یکسان هستند و کروموزوم‌های هومولوگ شامل ژن‌های یکسان ولی دارای دو نمونه از الل‌ها هستند که ممکن است با یکدیگر مشابه یا غیرمشابه باشند. جفت کروماتیدهای مشابه در هنگام تقسیم میتوز یا در هنگام تقسیم سلولی از یکدیگر جدا می‌شوند و در برخی از گونه‌ها کروماتیدهای خواهر برای ترمیم دی ان ای ترجیح داده می‌شوند. چسبیدن کروماتیدهای خواهر به علت توزیع صحیح اطلاعات ژنتیکی بین سلول‌های دختر و ترمیم کروموزوم‌ها ضروری است و سلول‌های زنده باید با تولید مثل به زندگی خود ادامه دهند، بنابراین سلول‌ها از لقاح تا بلوغ جسمی بارها تقسیم می‌شوند. زمانی که یک سلول تنها تقسیم می‌شود، دو سلول خواهر را شکل می‌دهند که کاملاً شبیه سلول اصلی هستند. طول زندگی سلول به نوع آن بستگی دارد و یک سلول ممکن است از چند روز تا چند سال زندگی کند و به دو روش میتوز و میوز تقسیم می‌شوند. در دنیا تا امسال بیش از پانصد نژاد اسب پدید آمده اما بیش از نود درصد آنها برپایه این قاعده اگر درصد ژنوم غالب بر ژن ژن مهاجم برتری پیدا کند با مشکلات فنوتیپ و ژنوتیپ مواجه هستند و انجمن‌های نژادی با کنترل این موضوع همواره میکوشند تا شاخص های تعریف شده ای برای عدم منفی شدن سیکل تولیدات نژادی خود ارائه دهند و در حدود تثبیت قرار گیرند.۱۰٫۹٫۲۰۱۹ ادامه آرتیکل در کامنت اول... #صنعت_اسب_در_ایران #کوهسین #ژن #اسب #اصلاح_نژاد #ژن_غالب #ژن_مغلوب #اختلاط_ژنومیک #آنافاز #میوز #تلوفاز #متافاز #پروفاز #میتوز #هتروکرومات #کروموزوم #equineir1 #cohesion #gene #chromatin #DNA #breeding #horse #protein_complex   #sister_chromatids #mitosis   #meiosis

551
5 days ago

Father and son Pierre-Joseph (1809-1894) and Edouard (1846-1910) van Beneden, prominent Belgian biologists from the universities of Leuven and Liège. The senior studied in Paris under Cuvier and was a well-respected parasitologist and expert of living and fossil marine mammals. He was the first to fully describe and understand the life cycle of tape worms (in Teania solium) in 1853. The junior is most famous for his work on chromosomes and the discovery of meiosis while studying eggs of the nematode Ascaris. Interestingly, the elder Van Beneden was an fixist while the younger was an influential evolutionist. #nature #history #naturalhistory #biology #cell #chromosome #meiosis #parasite #worm #evolution #Cuvier #mammal #paleontology #palaeontology #leuven #liège #belgium #belgië #belgique [First image from wikipedia, second from www.vmiz.be]

90
6 days ago

B̤̮Ṳ̮E̤̮N̤̮ M̤̮A̤̮R̤̮T̤̮E̤̮S̤̮ P̤̮A̤̮R̤̮A̤̮ T̤̮O̤̮D̤̮E̤̮S̤̮ . Les comparto unos cuadros de meiosis y mitosis que me sirvieron mucho para comprender! . . Ya arrancamos todos a preparar parciales, recuperatorios, finales? Por suerte diciembre esta a un paso🥳🥳🥳 exitosssssssss y SI SE PUEDE 👊🏽👊🏽👊🏽 . Pd: les subo al drive las imágenes por si les sirven 😘 . #study #studygram #studygrammer #cuadroscancheros #mitosis #meiosis #medicina #uba #fmed #biologiacelular

270
1 week ago

It’s Monday! I’m having a dirty chai - which sounds way more fun than it is and working on Meiosis notes before teaching today. If you listen to the audio please forgive all the ums - I obviously wasn’t fully caffeinated. Monday is time to get things done!!!

121
1 week ago

Finished my first lesson plan for this practicum and excited to get feedback on it from my Associate Teacher ☺️ Can’t wait to dive into genetics with my SBI3C class! 🧬🔬 #meiosis #lessonplan #teacher #education

120
1 week ago

FBQDicas: Já ouviram falar em COMPLEXO PROMOTOR DA ANÁFASE? Bom a ideia é clivar as ligações da proteína coesina, que mantém as cromátides irmãs unidas. Posterior a esse processo os microtúbulos do cinetocoro despolimerizam e conduzem as cromátides para os lados opostos da célula. Lembre-se que ANAfase (para lados opostos). Outro detalhe: cinetocoro é uma proteína que serve como sítio de ligação para os dímeros de tubulina componentes dos microtúbulos que por si são organizados por estruturas amorfas denominadas Centrossomos. Ah.. esse processo enzimático mostrado na imagem é controlado pelas M-CDKs através da ativação da proteína separase!!!! #citologia #divisaocelular #nucleo #eucariotos #thecell #biologia #biology #blogger #dicas #fbqdicas #winner #alberts #science #nature #mitosis #meiosis #celldivision #biologando #uerj #provas #nikity

190
2 weeks ago

Meiosis in a contrast microscope Meiosis corresponds to a process of cell division in which, from one cell is obtained another, however, it contains half the number of chromosomes that the  #original. This occurs so that the number of chromosomes of the gametes is half that present in the rest of the cells, so during  #fertilization #when  both gametes are combined the number of total chromosomes is recovered. Follow @incredible_medicine #medicine #doctor #medschool #medico #meiosis #scienceteacher #medical #creation

40
2 weeks ago

Meiosis pada Sel Hewan Pembelahan meiosis ini terjadi pada sel gametik hewan Pada tahap Anafase 1 terjadi Reduksi Kromosom (pengurangan set kromosom) Sumber: Campbell 11th Ed #meiosis #kariokinesis #sitokinesis

424
2 weeks ago

Who’d have thought 🍌 could grow in Aberystwyth? Must be all that Welsh ☀️ 🏴󠁧󠁢󠁷󠁬󠁳󠁿 🤔 ... or perhaps it was the tropical glasshouse... 😉 🌴

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2 weeks ago

#Repost @singlecellanimation with @make_repost ・・・ These are Chromosomes - made from the DNA of mom and dad. There are 23 pairs of chromosomes that make up the human genome, the 23rd determines male or female. As a cell splits during fertilization, the chromosomes split with them sending one copy of each DNA strand to the opposite side. #celldivision #chromosomes #dna #histones #medicalanimation #scientificanimation #biology #biotech #biotechnology #pharma #science #sciart #scicomm #viscom #singlecell #animation #medicalillustration #scientificillustration #cells #mitosis #daughtercells #meiosis #binaryfission #newyorkcity #northjersey #boston #eastcoast

511
2 weeks ago

Separação dos cromossomos na divisão celular #Repost @singlecellanimation with @repostapp ・・・ These are Chromosomes - made from the DNA of mom and dad. There are 23 pairs of chromosomes that make up the human genome, the 23rd determines male or female. As a cell splits during fertilization, the chromosomes split with them sending one copy of each DNA strand to the opposite side. #celldivision #chromosomes #dna #histones #medicalanimation #scientificanimation #biology #biotech #biotechnology #pharma #science #sciart #scicomm #viscom #singlecell #animation #medicalillustration #scientificillustration #cells #mitosis #daughtercells #meiosis #binaryfission #newyorkcity #northjersey #boston #eastcoast

576
3 weeks ago

Çrregullimet e Syrit ■NORMAL ■ANISOCORIA -Kur njeri sy ka bebëz të zgjeruar ndersa tjetri te ngushtur. ■MIOSIS -Kur bebëza e syve është e ngushtuar ■MIDRIASIS -Kur bebëza e syrit është e zgjeruar . . . . . . . . . #anisocoria #meiosis #midriasis #pupileye #animaleyes #eyesanimals #iriseye #lenseyes # #cornea #choroid #sclera #ophthalmology #ophthalmictech #opthalmic #pupillary #vetstudent #vetstudent # #gjilan # #shqip #kosov #prishtina #keshill #qeni #kafshet #

270
3 weeks ago

Anne ve babadan gelen 23 er kromozomumuz. DNA ipliklerimiz. Nasil muhtesem bir olusum.🤲🤲 Theta healing ile genclik ve canlilik kromozomlarina da calisildigini biliyormuydunuz ⚘⚘ Repost @singlecellanimation These are Chromosomes - made from the DNA of mom and dad. There are 23 pairs of chromosomes that make up the human genome, the 23rd determines male or female. As a cell splits during fertilization, the chromosomes split with them sending one copy of each DNA strand to the opposite side. #celldivision #chromosomes #dna #histones #medicalanimation #scientificanimation #biology #biotech #biotechnology #pharma #science #sciart #scicomm #viscom #singlecell #animation #medicalillustration #scientificillustration #cells #mitosis #daughtercells #meiosis #binaryfission #newyorkcity #northjersey #boston #eastcoast

573
3 weeks ago

These are Chromosomes - made from the DNA of mom and dad. There are 23 pairs of chromosomes that make up the human genome, the 23rd determines male or female. As a cell splits during fertilization, the chromosomes split with them sending one copy of each DNA strand to the opposite side. #celldivision #chromosomes #dna #histones #medicalanimation #scientificanimation #biology #biotech #biotechnology #pharma #science #sciart #scicomm #viscom #singlecell #animation #medicalillustration #scientificillustration #cells #mitosis #daughtercells #meiosis #binaryfission #newyorkcity #northjersey #boston #eastcoast

1.2k16
3 weeks ago

Hola! Lo subo nuevamente porque me había equivocado en algo🤣🤣 Ahora como el anterior : este post no era para ser publicado hoy pero alguien lo necesitaba.Ese fue el motivo de subir post un día domingo. Llevo ya algunos post sobre este tema pero este ya es el último. Espero les guste !!❤. . . . . . . . . . . . . . . . . . . . . #meiosis #mitosis #ciclocelular #biologia #study #studygram #studychile #studygramchile #caligrafia #lettering #colors #letrabonita #biology #studywithme #notes #studynotes #studygrammer #letras #profase #metafase #anafase #anafase #telofase #citosinesis #celulas

542
3 weeks ago

Copy number variations allow a species to adapt to their environment at a fast pace and is an important mechanism to evolution. Scientists have conducted research into human CNV’s to acquire more info on our evolution..research showed what might of made our brain grow in size. CNVs occur because recombination/crossing over. When you have one set of chromosomes from each parent, Each of the pairs line up and then starts exchanging genetic material. This process ensures genetic diversity. In recent years the duplication of genes has changed, the biggest change is within a fragment called DUF1220. Most mammals only have a couple DUF1220s, as can be read in the image. Marmosets have 31, chimps have 125, and humans have 272. DUF1220 shows a correlation with both brain size and neuron numbers in primates. Neanderthals appear to have had larger brains than our generation looking at skull size. Sure enough they also show to have had -300 DUF1220 domains. Find more information online at https://www.frontiersin.org/articles/10.3389/fnhum.2014.00427/full . . #evolution #evo #neanderthal #hominids #humanevolution #biology #dawkins #facts #sciencefacts #science #mitosis #meiosis #genetics #biodiversity #microbiology #microbes #genetics #anatomy #biologylovers #alevelbiology #biologystudents #biologyfacts #biologystudent #cellbiology #biology_ecology #biologyclass #biologyislife #biologyart #biologyofbelief #biologylife #biologynotes

110
3 weeks ago

Nisfia Nurfirdausy Sulistyo A24180173 #meiosis

500
3 weeks ago

Don’t forget to check out Dr. Lampson’s seminar, “Violation of Mendel’s First Law: chromosome competition in meiosis” at the BSRB Seminar Rooms A, B, and C starting at 9:30 AM today! Dr. Michael Lampson is an associate professor of Biology from the University of Pennsylvania. . . For more information about our upcoming events and seminars check out https://www.umcdb.org! . . #mendels #chromosomes #meiosis #seminarseries #umichcdb #umich_cdb #cdb #uofm

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> Membran inti rusak dan terbentuk gelendong pembelahan. 2. Metafase II >> Kromosom berjejer pada bidang pembelahan. 3. Anafase II >> Kromatid terpisah dan bergerak ke kutub yang berlawanan. 4. Telofase II >> Nukleus terbentuk dan kromosom terurai membentuk kromatin, lalu sitokinesis pun terjadi dan terbentuk 4 anakan yang bersifat haploid. Mohon penilaiannya Pak @muhsyukur72 dan kak @kalvin_laia">
3 weeks ago

#Meiosis Pada dasarnya proses meiosis 1 sama dengan proses mitosis. Hal yang membedakannya adalah pada meiosis 1 terdapat 5 tahap yang disingkat "Lazipadidi" yang merupakan singkatan dari Leptoten, Zigoten, Pakiten, Diploten, dan Diakinesis. Nah, pada diploten terjadi peristiwa pindah silang (Crossing Over) dan pada meiosis 1 selnya bersifat diploid, sedangkan pada mitosis tidak terjadi crossing over dan selnya bersifat haploid. 1. Profase II >> Membran inti rusak dan terbentuk gelendong pembelahan. 2. Metafase II >> Kromosom berjejer pada bidang pembelahan. 3. Anafase II >> Kromatid terpisah dan bergerak ke kutub yang berlawanan. 4. Telofase II >> Nukleus terbentuk dan kromosom terurai membentuk kromatin, lalu sitokinesis pun terjadi dan terbentuk 4 anakan yang bersifat haploid. Mohon penilaiannya Pak @muhsyukur72 dan kak @kalvin_laia

1881
3 weeks ago

My second paper from my Undergraduated Scientific Research, published in Ecotoxicology and Environmental Safety. “Potential of the Trad-MCN assay applied with inflorescences of Tradescantia pallida ‘Purpurea’ for evaluating air contamination by naphthalene” ES Alves, SR Souza, ANV Pedroso & M Domingos. / Segundo artigo referente à minha Iniciação Científica. The aims of this study were to determine clastogenic responses of Tradescantia pallida cv. Purpurea to naphthalene (NAPH) by means of the bioassay Trad-MCN with inflorescences of T. pallida cv. Purpurea and to verify if this assay might be an indicator of the potential risk imposed in a workplace, where solid insecticide containing NAPH is usually applied. The clastogenic potential of NAPH was assessed by using static and dynamic experimental systems. In both systems, increased micronucleus frequencies were observed in inflorescences submitted to increasing concentrations of solid or gaseous NAPH. The evident clastogenicity verified in inflorescences exposed experimentally to 25–50 mg m3 of NAPH during 6 h points to a narrow threshold of plant sensitivity, indicating risks under lower NAPH levels than the standards established by OSHA and therefore revealing its suitability for biomonitoring purposes. However, the clastogenic risk should be carefully investigated by other monitoring methods if human health is taken into consideration. #clastogenicity #naphthalene #naftalina #tradescantiapallida #brazilianscience #oxidativestress #genotoxicitytests #mutagenictests   #commelinaceae #tradmcn #herbarium #herbario #ecologiaaplicada #tetrades #graosdepolen #meiose #meiosis #plantcell #microscopia #microscopyoptical #cell #sciencelab #biologyteacher #lifescience #plantscience #citology #institutodebotanicasp #botany #biodiversidadeemfatias

330
3 weeks ago

I’ve been learning so much about the Ovulation cycle lately and the more I learn, the more fascinating it gets. The whole process was designed so perfectly well. These images capture the ovulation process from the top left to center in a clockwise spiral. . It’s crazy to think that YOU started off as one of these little tiny eggs. Out of millions of options, you were CHOSEN. Perfectly ovulated, perfectly fertilized, carried, birthed, fed and grown. The details of all this simply can’t happen by accident. Your LIFE was not an accident. Enjoy today, knowing that you are here on purpose 💕 . #Repost @ihearthisto with @get_repost • • • #histology #fam #fertilityawarenessmethod #doula #fertility #fertilitydoula #reproductivesystem #ovary #ovulation #pregnant #pregnancy #baby #oocyte #follicles #meiosis #oogenesis #anatomy #histotech #medschool #medstudent #birth #miracle #everybabyisamiracle #yourlifematters #histo #sciArt #pathArt #ihearthisto #ipreview via @preview.app

1441
3 weeks ago

การแบ่งเซลล์มี 2 ชนิด คือ ✅1. ไมโทซิส (mitosis) เป็นการแบ่งเซลล์ร่างกาย (somatic cell) โดยเมื่อแบ่งเสร็จจะได้ 2 เซลล์ลูก ที่มีลักษณะทางพันธุกรรมเหมือนเซลล์ต้นแบบ ✅2. ไมโอซิส (meiosis) เป็นการแบ่งเซลล์เพื่อสร้างเซลล์สืบพันธุ์ เมื่อแบ่งเสร็จจะได้ 4 เซลล์ลูก ที่มีการลดจำนวนโครโมโซมลงครึ่งหนึ่ง และมีลักษณะทางพันธุกรรมที่เปลี่ยนแปลงไปเนื่องจากประกฏการณ์ ครอสซิง โอเวอร์ (Crossing over) #Mitosis #Meiosis #CrossingOver #CellDivision #Chromosome #PageSuksaa

40
1 month ago

☑️ Observamos las diferentes etapas de la mitosis en la división celular. ☑️ El puntero señala específicamente la Anafase, en donde se separan los centrómeros hijos, y las cromátidas, que ahora se convierten en cromosomas hijos. Cada juego de cromosomas hijos migra hacia un polo de la célula. ☑️ Comenta qué otras etapas de la mitosis se pueden observar. ✏️: @nvaldivia19 #mitosis #meiosis #histology #biology #dancingpokemon #valdivia #vallenato #val #anatomy #pasion #biologia #biologiacelular #biologiamarinha #bebecita #bebesita #ellaecaiaita

34611
1 month ago

So, apparently this is the effect I get when I take photos near my window early in the morning 🌈 Anyway, this is a throw back of some mitosis/meiosis notes taken during a lesson a while ago; I also like doodling and quickly sketching some images I see on the OHP during lessons, I find it quite helpful ✏️ QOTD: Do you usually sketch while taking notes?

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