A maternal-effect gene is
A) when developmental phenotype is determined by the genotype of the mother.
B) a gene which produces a product which controls dorsal-ventral division of the embryo.
C) a gene which influences the polarity in Drosophila development.
D) a gene product which acts in a concentration dependent manner to direct morphogenesis.
E) All of the answers are correct.

Question

Quizplus · Accepted Answer

Maternal-effect genes are indeed defined by the genotype of the mother and influence the early development of the embryo, including aspects such as dorsal-ventral division and polarity in organisms like Drosophila. Their gene products can act in a concentration-dependent manner to direct morphogenesis, making all the provided options correct descriptions of maternal-effect genes.

A Maternal-Effect Gene Is