Question

hich statement is true about lethal genes?
They cannot be maintained in a gene pool because the individuals do not survive.
They cannot be maintained in a gene pool because they are always dominant.
They can be maintained in a gene pool by heterozygous carriers when the allele is recessive and the individuals reproduce.
They can be maintained in a gene pool if the allele is expressed before reproductive age

Answer 1

Many lethal genes are only expressed in the homozygous condition, so they can exist hidden away in heterozygotes and the ones in heterozygotes are not subjected to selection.

Answer 2

@jherrera57
so it would b?

Answer 3

It would be C