AP BIOLOGY

Detailed explanation-1: -Homozygous dominant denoted by two uppercase letters such as AA contain two copies of the alleles and diploid cells encoding for the dominant phenotype. In this case, the dominant trait is guaranteed to be expressed.

Detailed explanation-2: -That can be either AA or aa, homozygous dominant or homozygous recessive. An individual who is homozygous dominant for a particular gene will have two dominant “A” alleles for that gene. An individual who is homozygous recessive will have the “aa” genotype, two recessive “a” alleles.

Detailed explanation-3: -Aa-heterozygous dominant (individual has both dominant and recessive gene, but only one is expressed) Was this answer helpful?

Detailed explanation-4: -With eye color, for instance, “B” stands for a brown allele and “b” stands for a blue allele. An organism with two dominant alleles for a trait is said to have a homozygous dominant genotype. Using the eye color example, this genotype is written BB.

Detailed explanation-5: -For a gene, if “A” is the dominant allele and “a” is the recessive allele, a genotype of “Aa” will result in the dominant phenotype. The dominant allele is always expressed if both alleles are present.