Use a Punnett square to predict the offspring in a cross between a dwarf pea plant (homozygous recessive) and a tall pea plant (heterozygous). What is the phenotypic ratio of the offspring?

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podgorica podgorica · Answer 1 · 2019-08-14T07:25:26+02:00

Answer:

Tall : dwarf is 1:1

Explanation:

Let "T" represents the allele for a tall pea plant

while "t" represents the allele for a dwarf pea plant

Here "t" is recessive allele.

Genotype of dwarf pea plant (homozygous recessive) - tt

Genotype of tall pea plant (heterozygous) - Tt

A punnet square showing the cross between tt and Tt is given below-

T t

t Tt tt

Phenotypic ratio -

Tall : dwarf

Tt: tt

2:2

1:1

luisvaschetto luisvaschetto · Answer 2 · 2022-03-28T12:24:37+02:00

The phenotypic ratio of the offspring is 50% dwarf and 50% tall plants.

A Punnett square is a diagram used to estimate genotypic and phenotypic proportions in a genetic cross.

In this case, the Punnet square is heterozygous tall plants (Tt) x homo-zygous dwarf plants (tt).

T t

t 1/4 Tt 1/4 tt

In conclusion, the phenotypic ratio of the offspring is 50% dwarf and 50% tall plants.

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