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Ancestry DNA Question

Replies: 8

Re: Ancestry DNA Question

Posted: 11 Oct 2013 12:45PM GMT
Classification: Query
Agreed that during meiosis, crossover is not as common, as the paired chromosomal diploids are eventually sliced into four chromosomal haploids through a two step splitting process. However, by the time the teste cell is programmed to undergo meiosis, crossover has occurred many times. This occurs with cell multiplication from within the developing embryo and that eventually leads to specialization into organs, such as the testes.

You are always 50:50 your parents' DNA, but the percentage you are of any given grandparent's DNA can greatly vary due to this fact. That is why siblings often favor one of their parental lines and the other sibling more resemble the other parents'.
SubjectAuthorDate Posted
Lee_Maynus 10 Oct 2013 3:45AM GMT 
DPotts57 10 Oct 2013 9:59AM GMT 
APTurner 10 Oct 2013 1:07PM GMT 
S_H999 11 Oct 2013 5:16PM GMT 
Lee_Maynus 11 Oct 2013 6:45PM GMT 
MJ782 12 Oct 2013 5:34AM GMT 
Lee_Maynus 12 Oct 2013 7:01PM GMT 
Lee_Maynus 12 Oct 2013 8:49PM GMT 
APTurner 12 Oct 2013 10:12PM GMT 
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