Which of the Following is an Example of Genetic Mosaicism

Question

Which of the following is an example of genetic mosaicism?
A)Calico coat color in cats
B)Albinism in mice
C)Male pattern baldness in humans
D)Red-green color blindness in humans
E)White eyes in Drosophila

Accepted Answer

Calico coat color in cats is an example of genetic mosaicism because the coat color is determined by the expression of two different alleles on the X chromosome, which results in patches of different colors on the coat. Since female cats have two X chromosomes, they can express both alleles and have a mosaic coat color pattern.

Other choices are not examples of genetic mosaicism:
B) Albinism in mice is a result of a single mutation affecting the synthesis of melanin. 
C) Male pattern baldness in humans is a complex trait, influenced by multiple genes and environmental factors. 
D) Red-green color blindness in humans is caused by mutations in a single gene on the X chromosome, and affected individuals have the same mutation in all their cells. 
E) White eyes in Drosophila is a Mendelian trait caused by a mutation in a single gene, which is recessive to the wild-type allele.