Dihybrid Cross Video Lessons

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Problem: Suppose a particular species of tulip plant has three alleles for the gene that codes for flower color. The CR allele produces red tulips, the Cp allele produces purple tulips, and the Cw allele produces white tulips. CR is dominant over Cp and Cw, and Cp is dominant over Cw. For each of the following crosses, determine the expected ratio of offspring for each flower color. 2 red : 2 purple : 0 white2 red : 1 purple : 1 white1 red : 2 purple : 1 white1 red : 1 purple : 0 white2 red : 0 purple : 2 white1 red : 3 purple : 0 white

FREE Expert Solution

Given: CR (red) > Cp (purple) > Cw (white)


Dihybrid 1: CRCp × CpCw

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Problem Details

Suppose a particular species of tulip plant has three alleles for the gene that codes for flower color. The CR allele produces red tulips, the Cp allele produces purple tulips, and the Cw allele produces white tulips. CR is dominant over Cp and Cw, and Cp is dominant over Cw.

For each of the following crosses, determine the expected ratio of offspring for each flower color. 


2 red : 2 purple : 0 white

2 red : 1 purple : 1 white

1 red : 2 purple : 1 white

1 red : 1 purple : 0 white

2 red : 0 purple : 2 white

1 red : 3 purple : 0 white

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