In a monohybrid cross between Tt x Tt, what is the phenotype ratio of tall to short?

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Multiple Choice

In a monohybrid cross between Tt x Tt, what is the phenotype ratio of tall to short?

Explanation:
The main idea is how a monohybrid cross with complete dominance translates into the observed phenotypes. Crossing two heterozygotes (Tt x Tt) gives four equally likely genotypes: TT, Tt, tT, and tt. Any plant with at least one T (TT or Tt) shows the tall phenotype, while only the tt genotype is short. So three of the four possibilities produce tall and one produces short, giving a tall to short phenotypic ratio of 3:1 (about 75% tall, 25% short).

The main idea is how a monohybrid cross with complete dominance translates into the observed phenotypes. Crossing two heterozygotes (Tt x Tt) gives four equally likely genotypes: TT, Tt, tT, and tt. Any plant with at least one T (TT or Tt) shows the tall phenotype, while only the tt genotype is short. So three of the four possibilities produce tall and one produces short, giving a tall to short phenotypic ratio of 3:1 (about 75% tall, 25% short).

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