GENETICS AND EVOLUTION
GENETIC BASIS OF INHERITANCE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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AA
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aa
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Aa
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Both AA and aa
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Detailed explanation-1: -Individuals with genotypes AA and aa are homozygotes (i.e., they have two copies of the same allele).
Detailed explanation-2: -A = dominant. a = recessive. AA-homozygous dominant. Aa-heterozygous dominant (individual has both dominant and recessive gene, but only one is expressed) Was this answer helpful?
Detailed explanation-3: -Heterozygous. If an organism has two copies of the same allele, for example AA or aa, it is homozygous for that trait. If the organism has one copy of two different alleles, for example Aa, it is heterozygous.
Detailed explanation-4: -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.