Most sex-linked, recessive traits-including hemophilia and color blindness-appear in males. This phenomenon is BEST explained by which statement?

A-- In males, the recessive sex-linked genes appear only on the Y chromosome.
B-- Most of the genes on the X and Y chromosomes of males are recessive.
C-- Males have an XX chromosome with dominant genes.
D-- In males, the Y chromosome lacks the genes needed to mask the recessive genes on the X chromosomes.

A-- In males, the recessive sex-linked genes appear only on the Y chromosome.

Explanation:

the law of original horizontality explains:   why rocks appear in layers. correct answer: b the law suggests that all rock layers are originally laid down (deposited) horizontally and can later be deformed.   the principle is used by geologists to make assumptions about the relative ages of sedimentary rocks.

her affection for her parents makes her an especially sympathetic character.