Individuals who carry two copies of the recessive allele for which of the following are unable to produce melanin, the pigment responsible for human skin color?
A. albinism.
B. Huntington disease.
C. Down syndrome.
D. Sickle cell anemia.

Question

Individuals who carry two copies of the recessive allele for which of the following are unable to produce melanin, the pigment responsible for human skin color? 
	A.	albinism.
	B.	Huntington disease.
	C.	Down syndrome.
	D.	Sickle cell anemia.

anonymous · Answer

Albinism is when a person lacks melanin production.  You see this in African Americans, or hear about it more in African Americans.