Question

In blood typing, Rh+ or the having the Rh factor (R) is dominant over Rh- lacking the Rh factor (r). Can 2 Rh- parents produce an Rh+ child?

		yes
		no, the genetics can't work

Sickle cell anemia is a recessive disease in humans. If only one parent carries a recessive allele and the other parent is homozygous dominant, what the probability that a child will have sickle cell anemia?

		All or 100%
		3/4 or 75%
		1/2 or 50%
		1/4 or 25%
		none or 0%

A woman with AB blood type marries a man with B (whose mother had O blood type)? What possible blood types will their children have?

		all AB
		all B
		A and B
		A, B and AB
		AB, A, B and O