A trait is a distinguishing feature of an organism. Genes or the environment, or more commonly, interactions between them, can determine traits. The genotype is the genetic manifestation of a trait. The phenotype is the genotype's outer expression.
One is homozygous dominant and the other heterozygous is a correct statement.
What is homozygous and heterozygous?
A Homozygous person has two identical (RR or rr) Alleles, whereas a Heterozygous person has different Alleles (Rr).
What is a dominant and recessive trait?
- Recessive traits are those that are only expressed when two copies of the recessive allele are present in the progeny. A recessive trait is always homozygous for the letter 'aa.'
- When the dominant allele is present in one or two copies, dominant traits are always expressed in the progeny. 'AA' or 'Aa' can be homozygous or heterozygous for a dominant trait.
Thus, we can conclude that option B is correct.
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