Question

part b punnett squares
10 examine the following punnett squares and circle those that are correct

Explanation:

Step1: Recall Punnett - square rules

A Punnett square is used to predict the genotypes of a particular cross or breeding experiment. The alleles from one parent are placed along the top and the alleles from the other parent are placed along the side. Each box in the square is filled with the combination of alleles from the corresponding row - and column - parent alleles.

Step2: Analyze each Punnett square

For the first square with parents Dd and Dd:
The possible gametes from each parent are D and d. The correct combinations in the square should be DD, Dd, Dd, dd. This square is correct.
For the second square with parents Dd and Dd:
The combinations in the square are incorrect as the way of filling the alleles is wrong. It should follow the rule of combining gametes from each parent.
For the third square with parents Aa and Aa:
The possible gametes from each parent are A and a. The combinations AA, Aa, Aa, aa in the square are correct.
For the fourth square with parents Aa and Aa:
The combinations in the square are incorrect. The filling of alleles does not follow the proper combination of gametes from each parent.

Answer:

The first and the third Punnett squares are correct.