Question

which individual is most likely to allow a recessive lethal gene to be kept in a population over several generations?
heterozygous
homozygous recessive
homozygous dominant

Explanation:

A recessive lethal gene is a gene that causes the death of an organism when present in a homozygous recessive state. Heterozygous individuals (carriers) do not express the lethal phenotype because they have one normal (non - lethal) allele. Homozygous dominant individuals do not carry the recessive lethal allele at all. Homozygous recessive individuals will die due to the lethal gene. So, heterozygous individuals can carry the recessive lethal gene without being affected, allowing it to be passed on to the next generation.

Answer:

heterozygous