Question

Describe a typical cross using a homozygous dominant and a homozygous recessive pea plant. Be sure to discuss P, F1 and F2 generations, genotypes and phenotypes.

Answer 1

Let's say trait for Tallness of Pea Plants and a cross between a homozygous dominant and a homozygous recessive.

PARENT (P)

GENOTYPES: PHENOTYPES:

Homozygous dominant: TT Tall

Homozygous recessive: tt Short

F1 GENERATION TT x tt

GENOTYPE: PHENOTYPE:

Heterozygous: Tt Tall

F2 GENERATION Tt x Tt

GENOTYPES: PHENOTYPES:

TT Tall

Tt Tall

tt Short