4. A man who does not have freckles marries a woman who is heterozygous for freckles.
a. What are the two genotypes?
b. % of offspring that will be homozygous dominant
c. % of offspring that will be heterozygous
d. % of offspring that will be homozygous recessive
e. % of offspring that will have freckles
f. % of offspring that will not have freckles

An organ system consists of a group of organs that performs specific functions necessary for the survival of an organism. humans have eleven different organ systems: integumentary, skeletal, muscular, nervous, endocrine, circulatory, lymphatic, respiratory, digestive, urinary, and reproductive. discuss the function of neurons, the brain and the spinal cord within the human nervous system while explaining the interrelationship of each organ.