OBJECTIVE LIFE SCIENCE
GENETICS
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
Both are homozygous for the dominant trait.
|
|
|
One is homozygous dominant, and the other homozygous recessive.
|
|
|
Both are heterozygous for the dominant trait.
|
|
|
One is homozygous dominant and the other heterozygous.
|
Detailed explanation-1: -Which statement describes how two organisms may show the same trait yet have different genotypes for that phenotype? One is homozygous dominant and the other is heterozygous.
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: -When an organism has two of the same alleles for a specific gene, it is homozygous (homo means “same") for that gene. 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-4: -Genotype is the alleles, or the genetic makeup for the organism. Organisms can have the same phenotype when (1) they both have dominant alleles; for example TT or (2) are hybrids; for example Tt. Since the dominant allele will be expressed in the hybrid, both of these cases will produce the same phenotype.