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

question 9

Multiple Choice

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.

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