EMBRYOLOGY
CHROMOSOMES AND CELL DIVISIONS
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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RR
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Rr
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rr
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None of the above
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Detailed explanation-1: -A homozygous dominant genotype is one in which both alleles are dominant. For example, in pea plants, height is governed by a single gene with two alleles, in which the tall allele (T) is dominant and the short allele (t) is recessive.
Detailed explanation-2: -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-3: -A homozygous dominant individual has two of the same dominant alleles for a gene. For example, a plant that is homozygous dominant for the red flower color allele has the genotype RR.
Detailed explanation-4: -Individuals carrying two identical alleles (RR or rr) are known as homozygous. While individual organisms bearing different alleles (Rr) are known as heterozygous.