Here are 5 examples of genotypes, which represent the genetic makeup of an organism:
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gg: This genotype, as seen in pea plants, results in a yellow pea plant phenotype. The lowercase 'g' typically represents a recessive allele.
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AO: In humans, this genotype results in blood type A. 'A' is one allele and 'O' is another. Since A is dominant over O, the phenotype is blood type A.
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AA: This genotype also results in blood type A in humans. Having two 'A' alleles makes it a homozygous dominant genotype.
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AB: This genotype in humans leads to blood type AB. In this case, both A and B alleles are expressed, resulting in a codominant inheritance pattern.
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Homozygous dominant (e.g., TT): This refers to having two identical dominant alleles for a specific trait. For example, in pea plants, 'T' might represent the allele for tallness. A TT genotype would result in a tall plant.