Response:
A) 4 right-handed coils: 0 left-handed coil
Clarification:
Referring to the MENDELION CROSS:
We can observe NN, Nn, Nn, nn
NN, Nn, and Nn represent the 3 instances of right-handed coiling while nn denotes left-handed coiling.
In the case of shell coiling in snails, maternal inheritance plays a role, where the phenotype alone determines the offspring's traits.
Maternal traits: Since the female parent possesses right-handed shell coiling, all offspring will inherit this characteristic.
Thus, the observable phenotypic ratio is:
4 Right-handed coils: 0 Left-handed coils