Concerning the sex chromosomes, which of the
following is correct?
a. The Y chromosome carries a greater number of
genes for nonsexual traits than does the X.
b. X and Y are different in size but carry nearly
equal numbers of genes.
c. The X chromosome carries more genes for
nonsexual traits than does the Y.
d. The X chromosome carries only gender-related
genes.
e. The X chromosome carries the SRY gene.
Answer: c
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