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When crossed with Tt, half of the resulting offspring display the recessive trait, while the other half are heterozygous for the dominant trait.

1. Gregor Mendel is known as the father of genetics for his discovery of inheritance laws.
2. Alternative forms of a gene, known as alleles, determine variations of the same trait.
3. A cross between IAIB and IAIB results in genotypes such as IAIA, IAIB, IBIB, and IAIO.
4. When crossed with Tt, half of the resulting offspring display the recessive trait, while the other half are heterozygous for the dominant trait.

Correct answer: When crossed with Tt, half of the resulting offspring display the recessive trait, while the other half are heterozygous for the dominant trait.

Solution

The given scenario describes a test cross where a Tt individual is crossed with a tt individual, resulting in 50% heterozygous (Tt) and 50% recessive (tt) offspring. This matches Mendelian inheritance patterns.

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