Question

Part 2: Dihybrid Cross—Predicting Flower Color and Seed ShapeImagine that you are crossing two plants that are heterozygous for flower color and seed shape. The dominant and recessive alleles for these traits are as follows:purple flowers: Pwhite flowers: pround seeds: Rwrinkled seeds: rDetermine the genotype of each parent plant and write them below.Answer:Genotype of parent plant 1 PpRrGenotype of parent plant 2 PpRrQuestion: How will the alleles for these traits assort into the gametes that each parent might produce? (Hint: For a reminder on how alleles sort independently into gametes, refer to the illustration in Part 2, Question 2, in the Student Guide.)Answer:Type your answer here.Click or tap here to enter text.Parent plant 1Gamete 1:Gamete 2:Gamete 3:Gamete 4:Parent plant 2Gamete 1:Gamete 2:Gamete 3:Gamete 4:

Answer 1

In this dihybrid cross, we have two double heterozygous parents. Parent 1 (PpRr; Purple flowers, a Round seeds) and prent 2 (PpRr; Purple flowers, a Round seeds), to obtain the possible gametes we must combine each allele as it follows:

`\begin{gathered} P\begin{cases}R\rightarrow\text{ PR} \\ r\rightarrow\text{ Pr }\end{cases} \\ p\begin{cases}R\rightarrow\text{ pR} \\ r\rightarrow\text{ pr}\end{cases} \end{gathered}`

As each parent is a double heterozygous the gamete combination will be the same, having four gametes (PR, Pr, pR, pr) for parent one and four gametes (PR, Pr, pR, pr) for parent2.

Parent plant 1

Gamete 1: PR

Gamete 2:Pr

Gamete 3:pR

Gamete 4:pr

Parent plant 2

Gamete 1:PR

Gamete 2:Pr

Gamete 3:pR

Gamete 4:pr