F2

Definition

F2 stands for the second filial generation in Mendelian genetics. It is the offspring resulting from a cross of two F1 individuals.

5 Must Know Facts For Your Next Test

1. The F2 generation exhibits a phenotypic ratio that reveals the underlying genotypes of the parents.
2. Mendel observed a 3:1 phenotypic ratio in the F2 generation for single trait crosses (monohybrid).
3. In dihybrid crosses, Mendel found a 9:3:3:1 phenotypic ratio in the F2 generation.
4. The variation in the F2 generation supports Mendel's principle of segregation and independent assortment.
5. Studying the F2 generation helped Mendel formulate his laws of inheritance.

Review Questions

• What does the term F2 represent in genetics?
• What phenotypic ratio did Mendel observe in monohybrid crosses within the F2 generation?
• How does studying the F2 generation help support Mendel's principles?

Related terms

F1 Generation: The first filial generation, which is the offspring of an initial parental (P) cross.

Phenotype: The observable traits or characteristics of an organism resulting from its genotype.

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