A dark-red strain and a white strain of wheat are crosse...

Question

A dark-red strain and a white strain of wheat are crossed and produce an intermediate, medium-red F₁. When the F₁ plants are interbred, an F₂ generation is produced in a ratio of 1 dark-red: 4 medium-dark-red: 6 medium-red: 4 light-red: 1 white. Further crosses reveal that the dark-red and white F₂ plants are true breeding

Predict the outcome of the and generations in a cross between a true-breeding medium-red plant and a white plant.

Punnett square showing genotypic ratios for wheat color traits in genetics.

Accepted Answer

Hey everyone, Let's take a look at this question Together, Gene A and jean B. Both contribute to the pigmentation of flour in a plant, A dominant allele in either Gene A. Or B codes for high blue pigment concentrations. The pundit square for the cross is given below, determine the correct statement based on this in information. So we know from the question that both gene A and jean B contribute to pigmentation of flower in the plant, meaning that they exhibit additive gene action. Because both alleles are expressed equally, so an equal expression is additive, jean action. And since we're talking about additive gene action, we can go ahead and cross off answer choices A. And D. Because those are talking about non additive, which is not the case in this cross. And so looking at the answer choices B. And C. We see that the difference is between the dominant and recessive traits. And we know from the question that the dominant allele in either gene A. Or B codes for that high blue pigment. So that means that answer choice B. Is the correct answer because based on the cross and the public square that we see the dominant alleles of A. And B. Of the two genes are additive. So answer choice B is the correct answer. Hope you found this video to be helpful. Thank you and goodbye

Key Concepts

Incomplete Dominance

Genotypic Ratios

Punnett Square

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