Why does more crossing over occur between two distantly linked ge...

Question

Why does more crossing over occur between two distantly linked genes than between two genes that are very close together on the same chromosome?

Accepted Answer

Hello everyone and welcome to today's video. So which of the following best explains why jeans on the same chromosome are not always inherited together. Let's go over each of our answer choices so that we may solve this problem. Beginning by linkage. Remember that linkage is going to be, Genes are very close together in a chromosome and these genes are very close together in a chromosome are going to be inherited together. This is not what the question is asking for. So we're going to cancel it out. Then we have a p stasis and stasis is an interaction Between two or more genes are going to affect the phenotype. This is not what the question is really asking for either. So we're going to cancel it out. And finally we have played Tropea and remember that play Tropea describes when a single gene has multiple effects on the phenotype of an organism. This is not what the question is describing again. So we're going to cancel it out. And finally we have closing over. Remember that during May aosis we have a crossover event and this crossover event is going to exchange genetic information between chromosomes and then what is going to happen is that some genes are going to be transferred from one chromosome to the other. So genes on the same chromosomes are not always going to be inherited together. So crossing over is definitely going to be describing this and it is going to be the final answer to our question. I really hope this helped you and I hope to see you on the next one

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Why does more crossing over occur between two distantly linked genes than between two genes that are very close together on the same chromosome?