Question

if an allele is ________, it will mask the effect of the other allele.
options: dominant, genotype, phenotype, recessive
if an allele is ________, there must be two of them to show up in the phenotype.
options: dominant, heterozygous, homozygous, recessive
\bb\ is an example of a....
options: allele, gene, genotype, phenotype

Explanation:

First Question:

To determine the correct answer, we analyze the definitions: A dominant allele masks the effect of another (recessive) allele. Genotype refers to the genetic makeup, phenotype to the observable traits, and recessive alleles are masked by dominant ones. So the dominant allele masks the other.

A recessive allele is only expressed in the phenotype when two copies (homozygous recessive) are present, as dominant alleles mask them. Dominant alleles show with one copy, heterozygous has one dominant and one recessive, and homozygous is a genotype term (not about allele expression requirement here).

"BB" represents the genetic makeup (genotype) of an organism. An allele is a variant of a gene (e.g., B or b), a gene is a segment of DNA, and phenotype is the observable trait. So "BB" is a genotype.

Answer:

A. Dominant

Second Question: