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Question
Shell coiling in Limnaea is an example of
Shell coiling in Limnaea is an example of
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Solution
The correct option is C Maternal inheritance
Some factors are inherited from a source other than the nucleus. They are called cytoplasmic factors. It is also called ‘Extranuclear’ or ‘Extrachromosomal’ inheritance or ‘maternal inheritance’. Cytoplasmic DNA exists and functions as information carrying genetic material. Maternal influences are detected from the fact by reciprocal cross in a species. Example: Coiling in snails. Water snail Limnaea - some species where shell coils to right (dextral) and some other where shell coils to left (sinistral). Few species show both, where the mothers control it. Dextral is dominant to sinistral.So, the correct answer is 'Maternal inheritance'.
Some factors are inherited from a source other than the nucleus. They are called cytoplasmic factors. It is also called ‘Extranuclear’ or ‘Extrachromosomal’ inheritance or ‘maternal inheritance’. Cytoplasmic DNA exists and functions as information carrying genetic material. Maternal influences are detected from the fact by reciprocal cross in a species. Example: Coiling in snails. Water snail Limnaea - some species where shell coils to right (dextral) and some other where shell coils to left (sinistral). Few species show both, where the mothers control it. Dextral is dominant to sinistral.
So, the correct answer is 'Maternal inheritance'.
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