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An example of a sex - However a male has the shortened Y...

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An example of a sex-linked trait is colorblindness.  The gene for colorblindness is found on the X chromosome.  A woman is rarely colorblind because she usually has a dominant  gene for normal vision on one of her X chromosomes. 
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Unformatted text preview: However, a male has the shortened Y chromosome; therefore, he has no gene to offset a gene for colorblindness on the X chromosome. As a result, the gene for colorblindness expresses itself in the male....
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