A man who has a X-linked (sex-linked) allele will pass it on to O all his daughters
O all his sons
O 1/2 of his daughters
O 1/2 of his sons

all his daughters

Explanation:

Parents : (mom) XX • XY (dad)

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XX (every daughter will take an X from the mom and the other X from the dad)

what statement best describes the difference between the sympathetic and parasympathetic nervous systems?

the sympathetic nervous system prepares the body for intense physical activity and is often referred to as the fight-or-flight response. the parasympathetic nervous system has almost the exact opposite effect and relaxes the body and inhibits or slows many high energy functions.

geologic time scale (for gradpoint) =)