A cross is performed between a bird that is homozygous for red feathers and a bird that is homozygous for blue feathers. Purple offspring result due to incomplete dominance. Then, two of the purple offspring are crossed. What proportion of the offspring from the second cross will be purple?.

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15-06-2022
Biology

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A cross is performed between a bird that is homozygous for red feathers and a bird that is homozygous for blue feathers. Purple offspring result due to incomplete dominance. Then, two of the purple offspring are crossed. What proportion of the offspring from the second cross will be purple?.

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luisvaschetto luisvaschetto · Answer 1 · 2022-06-21T16:32:26+02:00

The proportion of the offspring from the second cross that will be purple is 1/2 because parents are heterozygous.

What is incomplete dominance?

In genetics, incomplete dominance makes reference to the phenomenon where both alleles are expressed in heterozygous individuals.

In this case, parents are heterozygous and therefore they can produce three types of offspring.

In this case, the genetic crosses include

Parental lines (P) AA x aa
Filial 1 (F1) 100% Aa
Filial 2 (F2) generation

A a

A AA Aa

a Aa aa

In conclusion, the proportion of the offspring from the second cross that will be purple is 1/2 because parents are heterozygous.

Learn more about incomplete dominance here:

https://brainly.com/question/7294889

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shivjimishraVT shivjimishraVT · Answer 2 · 2022-06-22T05:02:06+02:00

The proportion of the offspring from the second cross will be purple is 1/2, i.e. 50% of the offspring will be purple.

What is Incomplete Dominance?

Incomplete dominance may be defined as a phenomenon in which the F1 hybrid exhibits the characters intermediate for the parental genes.

Due to the heterozygous nature of both parents in the F1 generation, they produce offspring in the genotypic and phenotypic ratio of 1:2:1.

The Punnett square for this cross is described below:

To learn more about Incomplete dominance, refer to the link:

https://brainly.com/question/2881137

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