An X-linked recessive gene produces red-green color blindness in humans. A woman with normal color vision whose father was color-blind marries a color-blind man. What is the probability that their son will be color-blind

50% chance

Explanation:

If the woman's father was color blind then that means that he has the recessive gene on his X chromosome. The Y chromosome does not carry this trait. Now, she has inherited on of her mother's X chromosome and her father's recessive gene on the only X chromosome that he can provide. Since she is not color blind she has inherited a normal/dominant trait from her mother as well. Her male offspring will inherit either one normal or one recessive. So in this case there is a 50% chance of being a color blind male.

answer:   option a) glucagon was secreted by his pancreas before he ate the cookies because blood glucose was low. insulin was secreted after he ate the cookies because his blood glucose was high.

explanation:

the answer is z.

the human body has five levels of organization. level 1: cells. cells are the basic units of life and form the first level of organization. cells in the human body have specific functions. examples include nerve cells, blood cells, liver cells, and so on.