OBJECTIVE LIFE SCIENCE
GENETICS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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dominant allele
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recessive allele
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homozygous allele
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hybrid allele
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Detailed explanation-1: -Individuals inherit two versions of each gene, known as alleles, from each parent. In the case of a dominant trait, only one copy of the dominant allele is required to express the trait. The effect of the other allele (the recessive allele) is masked by the dominant allele.
Detailed explanation-2: -A dominant allele is denoted by a capital letter (A versus a). Since each parent provides one allele, the possible combinations are: AA, Aa, and aa. Offspring whose genotype is either AA or Aa will have the dominant trait expressed phenotypically, while aa individuals express the recessive trait.
Detailed explanation-3: -Dominant alleles are always expressed if present in the genotype. This can occur either with two dominant alleles (homozygous dominant) or one dominant allele and one recessive allele (heterozygous).