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Tt mates with Tt. What will be characteristic of offspring?

1. 75% recessive
2. 50% recessive
3. 25% recessive
4. All dominant

Correct answer: 25% recessive

Solution

A Tt × Tt cross produces genotypes TT, Tt, Tt, and tt. Only tt shows the recessive trait, so 1 out of 4 offspring, or 25%, are recessive.

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