Dextral (D) and sinistral (d) shell coiling in the water snail Limnaea peregra is genetically determined. From a population of mixed sinistral and dextral snails, a sinistral female and a dextral male are chosen. All the offspring are dextral. When the female offspring are mated, 50% produce only sinistral snails and the other 50% produce only dextral snails.
-This form of inheritance is called
A)maternal inheritance.
B)sex-limited inheritance.
C)sex-linked inheritance.
D)maternal effect.
E)partial penetrance.

Question

Quizplus · Accepted Answer

The inheritance pattern described is an example of maternal effect, where the phenotype of the offspring is determined by the genotype of the mother, regardless of the offspring's own genotype. In this case, the phenotype (shell coiling direction) of the offspring is determined by the genotype of the mother snail.

Dextral (D) and Sinistral (D) Shell Coiling in the Water