Question

which describes the mating of organisms that have different homozygous alleles for a single trait?
monohybrid cross

dihybrid cross

homozygous cross

heterozygous cross

Explanation:

To solve this, we analyze each option:

• Monohybrid cross: Involves mating organisms with different homozygous alleles for one trait (e.g., TT × tt for height). This matches the description.
• Dihybrid cross: Involves two traits, not one, so it's incorrect.
• Homozygous cross: Typically, a cross between two homozygotes with the same alleles (e.g., TT × TT), not different, so incorrect.
• Heterozygous cross: A cross involving heterozygotes (e.g., Tt × Tt), not matching the "different homozygous alleles" description.

Answer:

A. monohybrid cross