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You are given two populations of true-breeding tomato plants with two simple dominant/recessive traits that sort independently. Using the multiplication rule, how many different phenotypic combinations would you expect to see in the F2 generation? In what phenotypic ratio? a.two 3,1 b.three 9.6:1 c.four, 9:3:3:1

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Answer:

9:3:3:1

Explanation:

True-breeding organism, in this case plant, is the one that is homozygous for every trait.

So, if we cross two tomato plants that are true-breedin, for example AABB aabb:

P: AABB  x  aabb

F1: AaBb

all of the offspring will have heterozygous genotype

In F2 genereation (AaBb x AaBb), phenotype ration would be 9:3:3:1

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The result of F2 generation in the phenotypic ratio is 9:3:3:1.

The correct option is D.

What is the phenotypic ratio?

A phenotypic ratio is a numerical relationship between phenotypes that shows how often the frequency of one phenotype correlates with the frequency of another.

Calculation:

True-breeding plants are those that contain similar traits.

There is a crossing over of two true-breeding tomato plants

[tex]AABB\times aabb[/tex]

F1 generation will be  AaBb

All the offspring will be heterozygous.

In F2 generation

[tex]AaBb \times AaBb[/tex]

Thus, the phenotype ratio will be 9:3:3:1.

Learn more about phenotype, here:

https://brainly.com/question/20730322

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