Mendel’s Genetic Experiments with Pea Plants

(second filial generation) tall short P1 (parental generation) X cross pollination F1 (first filial generation) all tall (hundreds) self pollinate produced a ratio of tall:short, 3:1 (for hundreds of offspring) F2 (second filial generation) tall tall tall short

Mendel’s Theory of Genetics Dominant and Recessive Alleles For the trait height in pea plants, T = tall and t = short. If a plant has a T allele and a T allele (TT), would it be tall or short? tall If a plant has a T allele and a t allele (Tt), would it be tall or short? If a plant has a t allele and a t allele (tt), would it be tall or short? short

TT tt T t T t T T T t T t t t P1 F1 F2 tall short purebred X purebred hybrid all tall X tall T T T t T t t t F2 tall tall tall short