Question

question: what ratio of dominant to recessive traits does the f2 generation from a cross of the heterozygous f1 generation almost always exhibit? answer options: select one of four 3:1 2:1 1:3 1:1

Explanation:

In Mendelian genetics, when heterozygous (F1) individuals are crossed, the F2 generation shows a phenotypic ratio of dominant to recessive traits. Using a Punnett square for a monohybrid cross (e.g., Aa × Aa), the genotypes are AA, Aa, Aa, aa. The dominant phenotype (AA, Aa, Aa) and recessive (aa) give a ratio of 3:1 for dominant to recessive.

Answer:

3:1