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The Bull or the Cow
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<blockquote data-quote="aussie_cowgirl" data-source="post: 665092" data-attributes="member: 1279"><p>Yes. But there will be trait variation. His Dam has 2 sets of X chromosomes so dominant overides recessive genes. BUT if the progeny bull receives 1 X chromosome then some of the genes on that chromosome will be his dam's recessive unexpressed alleles. This is how conditions such as haemophilia skips generations. If the grandfather has the condition, the daughter WILL get the gene (Males have one X chromosome and a daughter has an X chromosome from both parents). If it is recessive she will be what's known as a carrier, so she has the gene but doesn't suffer from the condition and her <u>sons</u> have a 1:2 chance of having the condition.</p></blockquote><p></p>
[QUOTE="aussie_cowgirl, post: 665092, member: 1279"] Yes. But there will be trait variation. His Dam has 2 sets of X chromosomes so dominant overides recessive genes. BUT if the progeny bull receives 1 X chromosome then some of the genes on that chromosome will be his dam's recessive unexpressed alleles. This is how conditions such as haemophilia skips generations. If the grandfather has the condition, the daughter WILL get the gene (Males have one X chromosome and a daughter has an X chromosome from both parents). If it is recessive she will be what's known as a carrier, so she has the gene but doesn't suffer from the condition and her [u]sons[/u] have a 1:2 chance of having the condition. [/QUOTE]
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