GENETICS AND EVOLUTION
INHERITANCE AND VARIATION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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DNA
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Dominant allele
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Trait
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None of the above
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Detailed explanation-1: -Dominant-An allele whose trait always shows up in the organism when it is present.
Detailed explanation-2: -A dominant trait will always be expressed in the offspring if the dominant allele is present, even if there is only one copy of it (heterozygous or dominant homozygous, Aa or AA).
Detailed explanation-3: -Recessive alleles are only expressed when no dominant allele is present.
Detailed explanation-4: -Both copies of the gene can contribute to an individual’s phenotype. Dominant alleles will produce the phenotype associated with them, even in the presence of another allele.
Detailed explanation-5: -Individuals inherit two versions of each gene, known as alleles, from each parent. In the case of a recessive trait, the alleles of the trait-causing gene are the same, and both (recessive) alleles must be present to express the trait.