Question

Which statement describes the F1 generation of a Mendelian monohybrid cross between two true-breeding parents?
Only the dominant trait is visible in the F1 generation.
Only the recessive trait is visible in the F1 generation.
Neither the dominant nor recessive trait is visible in the F1 generation.
Both the dominant and recessive traits are visible in the F1 generation.

Answer 1

Only the dominant trait is visible in the F1 generation.

Explanation: Crossing two true-breeding parents with contrasting alleles (e.g., AA × aa) produces heterozygous F1 offspring (Aa) that display the dominant phenotype, while the recessive trait is masked.