Question 42
Mendelian InheritanceThe diagrams below are illustrations of the inheritance of coat colour in mice. J, K, L, M and N are parents. The cross between two parent mice gave rise to offspring P, Q, R and S. Which parent mouse is heterozygous for coat colour?
- A.M
- B.J
- C.K
- D.L
Show the answer and explanation
Answer: D (L)
Explanation
L is black but, crossed with the white mouse M, gives both black and white young. So L must carry a hidden white allele: it is heterozygous.