Deleterious Alleles Can Remain at Low Frequencies in Populations Because

question 45

Multiple Choice

Deleterious alleles can remain at low frequencies in populations because

• A) mutation can alter the allele to decrease its lethality.
• B) most individuals who carry the gene are heterozygous and do not suffer consequences of having two copies of the gene.
• C) heterozygotes most often pass on the dominant allele.
• D) many, but not all, homozygous-recessive individuals die.

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