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Hybrid sterility

Genetics as it applies to evolution, molecular biology, and medical aspects.

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Hybrid sterility

Postby appleberries » Wed Oct 12, 2005 9:25 am

Can someone pls help me explain why hybrid sterility occurs with reference to meiosis?
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Postby MrMistery » Wed Oct 12, 2005 5:26 pm

Well, usually hibrids have an odd number of chromosoms. So, the gamets will have something like 12 and 1/2 chromosoms :lol: :lol:
That is deffinetly not possible. be advised that there are also other reasons why they are sterile, but this is in regards with mieosis
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Postby victor » Thu Oct 13, 2005 12:03 pm

Another cause in sterille hybrids is because there're poliploids in the chromosome sequence or aneuploids...maybe because of non-disjunction during meiosis....
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Postby appleberries » Thu Oct 13, 2005 12:05 pm

thanks heaps!
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Postby victor » Thu Oct 13, 2005 12:12 pm

you're welcome... :D
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Postby zami'87. » Sat Oct 22, 2005 4:38 pm

Yeah chromosome sets are too different so junction and disjunction in meiosis is not possible..But if somehow chromosome sets doubloes like 2n1+2n2 then gametes would have n1+n2 chromosomes so then hybrid is fertile.Look Karpechenkov experiment.

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