hemizygous

Started by joonkimdds
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joonkimdds

joonkimdds

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what is hemizygous?
I got definition from googling it but I still don't understand it.


Could someone give me an example? especially for males?
 
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marcusnasland said:
refers to a one allelic condition.... so males are hemizygous for the sex chromosome, while females are either homozygous or heterozygous
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isn't it the opposite? I thought males are always heterozygous for having one X and one Y wheras females are always homozygous.
And is hemizygous = heterozygous since both of them have 1 sec chromosome?
 
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If there's only one allele for something then you are hemizygous for it. For example, the sry gene is on the Y chromosome. Females don't have it at all. Males are hemizygous for it.
You would never say you're hemi/hetero/homozygous for an entire chromosome.
 
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