genes for coat colour in cats

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

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Draco
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genes for coat colour in cats

Post by Draco » Thu Nov 01, 2007 4:44 pm

Is it possible for a tom cat to have tortise shell coat?

In biology I was told that some of the genes for coat colour where only found on the X chromosome not the Y, and that tortoise shell coats where only possible on females yet a friend of my parents has a male tortoise shell.

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MrMistery
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Post by MrMistery » Thu Nov 01, 2007 5:06 pm

It might a cat with Klinefelter :lol:
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Draco
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Post by Draco » Thu Nov 01, 2007 6:55 pm

So with the extra X chromosome it means it has two coat alleles instead of one therefore allowing the tom to have a tortoise shell coat if one cat passed on the ginger allele and the other passed on a different allele.

Intresting, Thanks MrMistery.
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canalon
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Post by canalon » Fri Nov 02, 2007 2:07 am

You should read about the calico phenotype
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Post by Draco » Mon Nov 05, 2007 10:51 am

What I dont understand is how the extra X chromosome occurs. any ideas.
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Post by Darby » Wed Nov 07, 2007 2:47 pm

During sex cell production (meiosis), a chromosome goes the wrong way. One resulting cell is missing an X, the other has an extra.

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