Question

Limnaea shell coiling is due to ______________.

• A. Maternal inheritance
• B. Cytoplasmic inheritance
• C. Extranuclear inheritance
• D. All the above

Answer 1

The correct option is D All the above

Limnaea shell coiling is due to Maternal inheritance. A maternal effect is a situation where the phenotype of an organism is determined not only by the environment it experiences and its genotype, but also by the environment and genotype of its mother. Maternal inheritance includes passing of extranuclear DNA to the offspring. This extranuclear DNA is present in the cytoplasm.

So, the correct answer is 'All the above'.