CELL DIVISION
MEIOSIS AND GENETIC VARIATION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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When a genotype has a dominant and recessive allele
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When a genotype has 2 copies of the recessive allele
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When a genotype has 2 copies of the dominant allele
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Detailed explanation-1: -An organism with two dominant alleles for a trait is said to have a homozygous dominant genotype.
Detailed explanation-2: -A homozygous plant contains either of the following alleles for seed shape: (RR) or (rr). The (RR) genotype is homozygous dominant and the (rr) genotype is homozygous recessive for seed shape.
Detailed explanation-3: -(HOH-moh-ZY-gus JEE-noh-tipe) 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-4: -rr. An individual who carries two copies of the same allele (i.e. RR or rr) is called a homozygote (homo = same, zygote = embryo). Homozygotes produce genoctypially identical offspring when allowed to self-fertilize. There are dominant homozygotes (i.e. RR individuals) and recessive homozygotes (i.e. rr individuals).