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
Ans: C
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