Question

What is an allele that can have a harmful effect?A) Deleterious alleleB) Dominant alleleC) Recessive traitD) Recessive allele

Answer 1

Many genetic diseases are caused by recessive mutations, which are harmless when present in one copy of a gene but can lead to severe or lethal disorders if present in both. Deleterious alleles segregating in populations of diploid organisms have a remarkable trend to be, at least, partially recessive

So, we can conclude that the correct answer is:

A) Deleterious allele