A father with type A blood and a mother with type B blood have a son with type AB blood. This is an example of:

Animals such as pronghorn antelope, bison ans badgers dot to the landscape. where are these animals located?

Epinephrine is a hormone released from the adrenal gland of the body, most often in a stressful situation. it is known as the "fight-or-flight" hormone. one way that it causes a response in the body is to activate receptors on muscle cells. where are these cellular receptors located? a. on the cell membrane b. in the nucleus c. on the cell wall d. around the mitochondria

How does the study of genetic disorders such as pku biologists understand normal alleles?