Human Anatomy & Physiology (11th Edition)
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN: 9780134580999
Author: Elaine N. Marieb, Katja N. Hoehn
Publisher: PEARSON
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**Dihybrid Cross Between Two Heterozygous Individuals**

Consider a genetic cross between two heterozygous individuals for two traits (genotype: AaBb x AaBb).

- **Genotype Ratio:** This indicates the possible genetic combinations for the offspring, based on the combination of alleles received from each parent.

- **Phenotype Ratio:** This ratio describes the observable characteristics of the offspring that arise from the genotype combinations.

To analyze a dihybrid cross like this, one can use a Punnett square to visualize and calculate the expected ratios. In a typical dihybrid cross of this nature, the phenotypic ratio usually observed is 9:3:3:1 for the combination of traits, assuming Mendelian inheritance without linkage or epistasis.
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Transcribed Image Text:**Dihybrid Cross Between Two Heterozygous Individuals** Consider a genetic cross between two heterozygous individuals for two traits (genotype: AaBb x AaBb). - **Genotype Ratio:** This indicates the possible genetic combinations for the offspring, based on the combination of alleles received from each parent. - **Phenotype Ratio:** This ratio describes the observable characteristics of the offspring that arise from the genotype combinations. To analyze a dihybrid cross like this, one can use a Punnett square to visualize and calculate the expected ratios. In a typical dihybrid cross of this nature, the phenotypic ratio usually observed is 9:3:3:1 for the combination of traits, assuming Mendelian inheritance without linkage or epistasis.
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