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What is the cross between the progeny of...

What is the cross between the progeny of `F_(1)` and the homozygous recessive parent called? How is it useful?

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### Step-by-Step Solution: 1. **Understanding the Terms**: - **Homozygous Recessive**: This refers to an organism that has two identical recessive alleles for a trait. For example, in pea plants, if we consider height, the homozygous recessive genotype would be represented as 'tt' (where 't' is the recessive allele for dwarfism). - **F1 Generation**: This is the first filial generation resulting from a cross between two parental (P) generations. The F1 generation is typically heterozygous for the dominant trait, represented as 'Tt' (where 'T' is the dominant allele for tallness). 2. **Identifying the Cross**: - The cross in question is between the F1 progeny (Tt) and a homozygous recessive parent (tt). This type of cross is specifically known as a **Test Cross**. ...
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