GENETICS AND EVOLUTION
INHERITANCE AND VARIATION
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
Aa
|
|
|
DD
|
|
|
tt
|
|
|
Gg
|
|
|
Ff
|
Detailed explanation-1: -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-2: -The presence of two identical alleles at a particular gene locus. A homozygous genotype may include two normal alleles or two alleles that have the same variant.
Detailed explanation-3: -The correct answer: The genotype which shows the character of homozygous dominant is D. SS.
Detailed explanation-4: -If there are two alleles in a population at locus A (A and a), then the possible genotypes in that population are AA, Aa, and aa. Individuals with genotypes AA and aa are homozygotes (i.e., they have two copies of the same allele).