F2

Definition

F2 generation is the second filial generation resulting from a cross between two F1 individuals. It often displays a phenotypic ratio of 3:1 in Mendelian inheritance patterns, where three individuals exhibit the dominant trait and one shows the recessive trait.

5 Must Know Facts For Your Next Test

1. Mendel's classic pea plant experiments produced an F2 generation by self-pollinating F1 hybrids.
2. In a monohybrid cross, the F2 generation typically exhibits a 3:1 phenotypic ratio.
3. The genotypic ratio in the F2 generation of a monohybrid cross is usually 1:2:1 (one homozygous dominant, two heterozygous, one homozygous recessive).
4. The appearance of both dominant and recessive traits in the F2 generation supports Mendel's law of segregation.
5. F2 generations are crucial for studying inheritance patterns and validating genetic theories.

Review Questions

• What is the typical phenotypic ratio observed in an F2 generation from a monohybrid cross?
• How does the genotypic ratio in an F2 generation differ from its phenotypic ratio?
• Why is the study of F2 generations important in understanding Mendel's laws?

Related terms

F1 Generation: The first filial generation resulting from a cross between two parental lines.

Genotype: The genetic makeup of an organism, which determines its specific traits.

Phenotype: The observable physical or biochemical characteristics of an organism as determined by both genetic makeup and environmental influences.