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Which of the following statements is true regarding an individual's genotype?
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13. Mendelian Genetics
Genotype vs. Phenotype
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Which of the following genotypes is heterozygous dominant?
A
aa
B
AA
C
A-
D
Aa
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Understand the concept of genotype: A genotype refers to the genetic makeup of an organism, specifically the alleles it possesses for a particular gene. Alleles are different forms of a gene, and they can be dominant or recessive.
Define heterozygous: An organism is heterozygous for a gene if it has two different alleles for that gene. In the context of dominance, one allele is dominant and the other is recessive.
Identify the alleles: In the given options, 'A' represents the dominant allele and 'a' represents the recessive allele.
Analyze the genotypes: The genotype 'Aa' consists of one dominant allele (A) and one recessive allele (a), making it heterozygous dominant. The genotype 'AA' is homozygous dominant, and 'aa' is homozygous recessive.
Conclude the correct genotype: Based on the definitions, the genotype 'Aa' is heterozygous dominant because it contains both a dominant and a recessive allele.
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