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Why do sex-linked traits occur in males more often than females and give an example.

asked
User Hexdoll
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1 Answer

3 votes
Female = X chromosome
X chromosome

Male= Y chromosome
X chromosome

If the offspring Is male the father passes on Y chromosome.
If the trait is recessive and carried on the X chromosome then because the males only have one X chromosome the trait will be expressed, this is why they have a much higher chance of inheriting the trait, whereas if it was a female who inherited the recessive trait the other X chromosome she has can provide genes that are damaged or missing.
E.g. Haemophilia
Red-green colour blindness
Duchenne muscular dystrophy

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