What is the chance that the 4th child from the couple indicated by the arrow will have a girl who suffers from the disease?

Explanation:

Tho i can see no arrow but there is probability of 75% that a fourth child suffers the disease of the parent

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.