In a cross between two heterozygous tall plants (Tt x Tt), what percentage of offspring will be tall?

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Multiple Choice

In a cross between two heterozygous tall plants (Tt x Tt), what percentage of offspring will be tall?

Explanation:
Dominant-recessive inheritance is being tested. Tall is produced whenever there is at least one dominant allele (T). Crossing two heterozygotes (Tt x Tt) yields genotype possibilities TT, Tt, Tt, tt. The first three genotypes have at least one T and are tall; only the tt genotype is short. That’s three tall outcomes out of four, a 3:1 phenotypic ratio, meaning 75% will be tall and 25% will be short.

Dominant-recessive inheritance is being tested. Tall is produced whenever there is at least one dominant allele (T). Crossing two heterozygotes (Tt x Tt) yields genotype possibilities TT, Tt, Tt, tt. The first three genotypes have at least one T and are tall; only the tt genotype is short. That’s three tall outcomes out of four, a 3:1 phenotypic ratio, meaning 75% will be tall and 25% will be short.

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