GENETICS AND EVOLUTION
MOLECULAR BASIS OF INHERITANCE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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a haploid cell
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an allele of a gene
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an organism with a dominant phenotype
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an organism with a recessive genotype
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Detailed explanation-1: -Recessive alleles only express their phenotype if an organism carries two identical copies of the recessive allele, meaning it is homozygous for the recessive allele. This means that the genotype of an organism with a dominant phenotype may be either homozygous or heterozygous for the dominant allele.
Detailed explanation-2: -So, the correct answer is D “Tt".
Detailed explanation-3: -A person who is heterozygous for red hair has one allele for a dominant trait, like brown hair, and one allele for red hair. They can pass the red hair allele to their future children. If the child inherits the same allele from the other parent, they’ll be homozygous and have red hair.
Detailed explanation-4: -A heterozygous genotype is a genotype that has multiple different alleles present in that gene. For example, a genotype that is “Tt” would be heterozygous, where the capital “T” could represent the trait of “tall” and the lowercase “t” could represent the trait of short.