Question

yy is an example of...
a genotype.
an allele.
a phenotype.
a gene.

Explanation:

• Genotype: Refers to the genetic makeup of an organism. It is represented by pairs of alleles (e.g., YY, Yy, yy). In this case, YY shows the combination of alleles for a particular trait, which is the definition of a genotype.
• Allele: An allele is a single form of a gene (e.g., Y or y, not YY).
• Phenotype: Is the observable physical or biochemical characteristic (e.g., yellow color if Y represents the allele for yellow).
• Gene: A gene is a segment of DNA that codes for a specific trait (not a combination like YY).

Answer:

A. a genotype.