bio question

[hope_to_match]

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can someone please explain to me why 'the greater the distance between two genes on a chromosome,the more likely the two genes will cross over during synapsis'

I am having trouble understanding this..I thought crossing over occurs between homologes not between genes on the same chromosome. Can someone please elaborate on that? Or maybe provide a good youtube link or a picture? Thank you!

 

[Riz0791]

Yes, crossing over is between homologous chromosomes. If the genes on both chromosomes are far apart the chromosomes are more likely to break and 'exchange DNA", if however the genes are close its less likely for the chromosomes to break and therefore less likely for crossing over to occur

 

[hope_to_match]

Yes, crossing over is between homologous chromosomes. If the genes on both chromosomes are far apart the chromosomes are more likely to break and 'exchange DNA", if however the genes are close its less likely for the chromosomes to break and therefore less likely for crossing over to occur

i don't really understand why if distance is greater they are more likely to cross over

why is it more likely for them to break apart if the distance is greater?

 

[bigTOOTHguy]

You are over this information. If two genes are further apart on the same chromosome there is a greater chance that they will break apart because there is more distance between them. I cant really think of a good analogy. basically if you put two dots on a sheet of paper and randomly ripped it in half dots that are further apart are more likely to be separated.

 

[hope_to_match]

You are over this information. If two genes are further apart on the same chromosome there is a greater chance that they will break apart because there is more distance between them. I cant really think of a good analogy. basically if you put two dots on a sheet of paper and randomly ripped it in half dots that are further apart are more likely to be separated.

that's an awesome analogy! thanks! i got it 👍