Question

Using a Punnett square, predict the phenotypic ratio of the offspring in a cross between a dwarf pea plant (homozygous recessive) and a tall pea plant (heterozygous).

a) 1:2 (Dwarf:Tall)
b) 2:1 (Dwarf:Tall)
c) 1:1 (Dwarf:Tall)
d) 3:1 (Dwarf:Tall)

Answer 1

The phenotypic ratio of the offspring in a cross between a dwarf pea plant (homozygous recessive) and a tall pea plant (heterozygous) is 1:1 (Dwarf:Tall).

Step-by-step explanation:

To predict the phenotypic ratio of the offspring in a cross between a dwarf pea plant (homozygous recessive) and a tall pea plant (heterozygous), we can use a Punnett square. The dwarf pea plant is homozygous recessive (tt) and the tall pea plant is heterozygous (Tt). When we cross these two plants, the possible genotypes of the offspring are Tt and tt. The phenotypic ratio of the offspring would be 1:1 (Dwarf:Tall), as both the genotype tt and Tt are expressed as dwarf plants. Therefore, the correct answer is c) 1:1 (Dwarf:Tall)