Most genes have many more than two alleles. However, which of the following is also true?
A) At least one allele for a gene always produces a dominant phenotype.
B) Most of the alleles will never be found in a live-born organism.
C) All of the alleles but one will produce harmful effects if homozygous.
D) There may still be only two phenotypes for the trait.
E) More than two alleles in a genotype is considered lethal.

Question

Quizplus · Accepted Answer

Even though genes may have many alleles, only two alleles can be present in an organism's genotype, one from each parent. Therefore, there may still be only two phenotypes for a trait, even if there are many alleles for that gene.

Most Genes Have Many More Than Two Alleles