In pigeons, gray feathers (G) are dominant to red feathers (g).

Question

A homozygous gray feathered pigeon (GG) is crossed with a heterozygous gray feathered pigeon (Gg). The parent alleles have been placed for you. Complete the Punnett Square to determine the potential offspring.

Place only one label in each box.
You may use each label more than once.
You do not need to use all the labels.
(2 points)
Drop target 1
Drop target 2
Drop target 3
Drop target 4

Answer 1

To complete the Punnett Square for the cross between a homozygous gray feathered pigeon (GG) and a heterozygous gray feathered pigeon (Gg), you can follow these steps:

1. Write the alleles of the parents along the top and left sides of the Punnett Square.

   • The alleles of the homozygous gray pigeon (GG) are G and G.
   • The alleles of the heterozygous gray pigeon (Gg) are G and g.

2. Fill in the Punnett Square by combining the alleles from each parent.

Here is how the Punnett Square would look:

      G   |   G
    -----------------
G |  GG  |  GG
    -----------------
g |  Gg  |  Gg

Now, we can summarize the potential offspring:

• 2 offspring with genotype GG (homozygous gray)
• 2 offspring with genotype Gg (heterozygous gray)

Based on your prompt, you can fill the boxes with the potential offspring labels:

1. GG
2. GG
3. Gg
4. Gg

So the final answers to drop into the Punnett Square would be:

• Target 1: GG
• Target 2: GG
• Target 3: Gg
• Target 4: Gg

This shows that all offspring will have gray feathers, but their genotypes will vary.