but, luckily, scientists develop a way for women to produce babies by virgin birth. Meiocytes are converted directly (without undergoing meiosis) into zygotes, whichimplant in the usual way. What would be the short- andlong-term effects in such a society?
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but, luckily, scientists develop a way for women to produce babies by virgin birth. Meiocytes are converted directly (without undergoing meiosis) into zygotes, which
implant in the usual way. What would be the short- and
long-term effects in such a society?
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- In a possible future scenario, male fertility drops to zero, but, luckily, scientists develop a way for women to pro-duce babies by virgin birth. Meiocytes are converted di-rectly (without undergoing meiosis) into zygotes, which implant in the usual way. What would be the short- andlong-term effects in such a society?Describe one function, brought about by the process of meiosis thatspermatogenesis and oogenesis have in common. Please write the similarities between spermatogenesis and oogenesis in a paragraph ratherthan a table. Please discuss the process mentioning differentiation, multiplication anddivision. How many stages of meiosis do they go through. Please mention if haploid ordiploid cells are formed."Meiosis, oh meiosis, let me tell you what it means. It's a special kind of cell division with some funny little genes. It starts with a cell splitting in two, just like mitosis would; but from there, things get wild and wacky, and I'll tell you if I could. Instead of dividing once more, the cells each split again; creating four brand new cells, not just two like back then. And here's where the magic happens, with chromosomes all pairing up, then swapping bits of info, a dizzying process that can't be summed up. When all is said and done, those four new cells are not quite the same; they've got half the number of chromosomes, and a whole new genetic game. Meiosis, oh meiosis, it's a puzzle that's so much fun. And if you study it like I have, you'll see how it all gets done!"
- Which statement is true of meiosis? 1)two identical cells in both divisions 2)the first division produces haploid cells and the second produces diploid cells 3)the first division produces diploid cells and the second produces haploid cells 4) the products of both meiotic divisions are haploidOne of the advantages of sexual reproduction is that it promotes genetic diversity in the offspring. This is because gametes are produced by meiosis, which introduces genetic variation into the resulting gametes. How does meiosis accomplish this? Describe one way (there are several choices) in which meiosis produces new combinations of genes in gametes.What would happen,if meiosis in humans always produced diploid gametes? Explain?
- What is the chromosomal number of the following: (haploid, diploid, triploid, tetraploid) 1. Kidney cell2. skin cell 3. Sertoli Cell 4. ootid 5. endosperm cell 6. primary spermatocyte7. secondary oocyte 8. sperm 9. Zygote10. erythrocyteThe Cavendish banana, the world’s most popular fruit, is currently threatened by extinction due to a fungus. This bananavariety is “triploid” (3n, with three sets of chromosomes) andcan only reproduce through cloning by cultivators. Givenwhat you know about meiosis, explain how the banana’s triploid number accounts for its inability to form normal gametes.Considering genetic diversity, discuss how the absence ofsexual reproduction might make this domesticated speciesvulnerable to infectious agents.If a human gamete with an extra chromosome participates in fertilization with a gamete with a normal number of chromosomes, how many chromosomes will the zygote have? Explain your answer. (Remember, zygotes are diploid)
- meiosis mitosis and meiosis mitosis 1. involves two successive nuclear and cell divisions 2. yields haploid daughter cells 3. results in production of four genetically different daughter cells 4. involves chromosome movement and distribution to daughter cells 5. preceded by replication of chromosomes during interphase 6. results in the production of gametes 7. involves pairing of homologous chromosomes and crossing-over 8. results in the production of two genetically identical daughter cellsIf gametes had the same number of chromosomes as body cells, and an organism had 24 chromosomes in its body cells, how many chromosomes would it have after three generations? How does this illustrate the necessity of meiosis for gamete formation?Females are born with a limited number of oocytes which, once depleted, they are no longer viable for sexual reproduction. Males though continue to produce spermatozoa even after their death. Why do you think males produce gametes throughout life yet females have a limited timespan? Does this mean males can be efficient in sexual reproduction until they are physically incapable?