Complete this Punnett Square.(4 points)

Drop target 1AA
Drop target 2Aa
Drop target 3Aa
Drop target 4aa
AAAaaa
Question 2
Assuming that the gene on your Punnett square follows the mendelian inheritance pattern of complete dominance. What is the phenotypic ratio for the square you completed?(1 point)
Responses

1:1
1:1

2:1
2:1

3:1
3:1

4:1

1 answer

To complete the Punnett Square for the genotypes you've provided (AA, Aa, Aa, aa), let's set it up:

         A      A
      -----------------
   A |   AA    AA   |
      -----------------
   a |   Aa     Aa   |
      -----------------
   a |   aa     aa   |

The completed Punnett Square shows the following genotypes:

  • 2 AA
  • 2 Aa
  • 1 aa

Now let's list the genotypes again to interpret their phenotypes assuming that "A" (dominant) expresses a dominant trait and "a" (recessive) expresses a recessive trait:

  • AA → dominant phenotype
  • Aa → dominant phenotype
  • aa → recessive phenotype

From the completed Punnett Square:

  • Dominant phenotypes (AA + Aa): 4
  • Recessive phenotypes (aa): 1

Therefore, the phenotypic ratio is:

  • Dominant:Recessive = 4:1

So, the answer to the second question is:

4:1