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Home Q & A Board Biology-Related Homework Help Genetics and Developmental Biology
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micromarc micromarc
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12 years ago
What special term is used for a woman who is heterozygous for a sex-linked trait which she does not express herself?

and

Colour blindness is a sex-linked trait.  A woman whose father is colour-blind marries a normal man.

What is the chance that a first-born son will be colour-blind?
What is the chance that a first-born daughter will be colour-blind?
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wrote...
#1
12 years ago
The woman is a carrier.

They have a 1/2 chance of getting a colour-blind first-born son, but no chances of getting a first-born daughter who is colour-blind: since the father has normal vision, and colour-blindness is a recessive trait, the daughter will not be colour-blind, but a carrier.
wrote...
#2
12 years ago
the woman may be called a carrier.
the boy have 50% chance of being colour blind
the girl will not be colour blind but can be a carrier
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