Males are more vulnerable to recessive gene disorders carried on the X chromosome in the 23rd position because
A. the female chromosome is dominant over the male chromosome in most cases.
B. mutations are more likely to occur in the Y chromosome than in the X chromosome.
C. the smaller Y chromosome does not contain enough genes to match each of the genes on the X chromosome so recessive genes on the X chromosome show up.
D. recessive genes that pair up with dominant genes on the X chromosome will be expressed in the male.
Answer: C
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