A mule is the offspring of a horse and a donkey. A donkey sperm c...

Question

A mule is the offspring of a horse and a donkey. A donkey sperm contains 31 chromosomes and a horse egg cell contains 32 chromosomes, so the zygote contains a total of 63 chromosomes. The zygote develops normally. The combined set of chromosomes is not a problem in mitosis, and the mule combines some of the best characteristics of horses and donkeys. However, a mule is sterile; meiosis cannot occur normally in its testes (or ovaries). Explain why mitosis is normal in cells containing both horse and donkey chromosomes but the mixed set of chromosomes interferes with meiosis.

Accepted Answer

Hello everyone and welcome to today's video. So today we have that the condition in which there is a presence of three homologous chromosomes on chromosome 21 is called blank. While the condition brought by the presence of three sets of chromosomes is called blank. Remember these are all genetic conditions And this takes a lot of memorization. So I want to help you recall what each of these genetic conditions listed here or in order to solve this problem. So here we have them beginning by tripe loyalty. This is when an extra chromosome set is present. So it brings the number of chromosomes from 46 to 69. Then we have Klein net filter which is when a male has an extra X chromosome. Then we have turner syndrome which is when a female is missing or partially missing this X chromosome. And then we have down syndrome which is also called trisomy 21 which is when there is an extra home ah Lagos chromosome on chromosome 21. So remember that in this problem. First of all we have that this condition or the first one here is a condition brought by the presence of three home molecules chromosomes on chromosome 21. So this is going to be down syndrome according to the definition that we have here. So this is what we're going to put here while the condition brought by the presence of three sets of chromosomes or the present, the presence of an extra set of chromosomes is called blank. Well here we have the employee which is an extra chromosome set. Which is what we have in this question. Because of this, this condition is going to be true employee. So the correct answer choice is going to be answer choice. B Down syndrome and trip loyalty are going to be the conditions that the question is talking about. I really hope this video helped you, and I hope to see you on the next one.

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