Allen Learned in His College Biology Class That, in Sex

Allen learned in his college biology class that, in sex chromosomes, the _____.

A) Y chromosome is larger than the X chromosome and has more genes
B) X chromosome is larger than the Y chromosome and has more genes
C) X and Y chromosomes are the same size, but the X chromosome has more genes
D) X and Y chromosomes are the same size and have the same number of genes