In mammals, which type of phenotypic expression will show recessive traits more frequently in males...
BIOLOGY
SAT 2021
In mammals, which type of phenotypic expression will show recessive traits more frequently in males than females?
- A. Co-dominance
- B. Incomplete dominance
- C. Complete dominance
- D. X-linked
Correct Answer: D. X-linked
Explanation
The correct answer is X-linked. Mammalian females have two X chromosomes, with recessive alleles often not apparent unless there are two copies. Mammalian males have only one X chromosome, so any recessive alleles on it will be expressed.
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