Dominant alleles determine a phenotype when an individual is ____ for that particular gene.
A)neither homozygous nor heterozygous
B)either homozygous or heterozygous
C)only heterozygous
D)only homozygous

Question

Quizplus · Accepted Answer

Dominant alleles will determine the phenotype regardless of whether the individual is homozygous or heterozygous for that gene. In other words, the dominant allele will always be expressed over the recessive allele, so an individual with at least one dominant allele will show the dominant phenotype. Therefore, the individual can be either homozygous dominant (two copies of the dominant allele) or heterozygous (one dominant and one recessive allele) for the dominant allele to determine the phenotype.

Dominant Alleles Determine a Phenotype When an Individual Is ____