NEET 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. An example of a homozygous dominant trait is brown eyes or freckles.

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: -As carriers, you and your mate are both heterozygous (Aa). This disease only afflicts those who are homozygous recessive (aa).

Detailed explanation-4: -An organism can be either homozygous dominant ( TT ) or homozygous recessive ( tt ). If an organism has two different alleles ( Tt ) for a certain gene, it is known as heterozygous (hetero-means different).

Detailed explanation-5: -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.