Question

jamal is practicing punnett squares. based on this sample, which box did he not fill out correctly?
options: b. c. d. a.
(image of a punnett square with boxes labeled a, b, c, d and genotypes dd, dd, dd, dd etc.)

Explanation:

Step1: Analyze Punnett square rules

In a Punnett square, when crossing \(Dd\times Dd\), the possible combinations are \(DD\), \(Dd\), \(Dd\), \(dd\).

Step2: Check each option

• Option a: \(Dd\) is a valid combination.
• Option b: \(Dd\) is a valid combination.
• Option c: \(Dd\) is a valid combination.
• Option d: \(dd\) is a valid combination, but in the given Punnett square structure (assuming standard \(Dd\times Dd\) cross where rows and columns are for gametes), if we consider the correct filling based on allele segregation, \(dd\) in that position is incorrect as per the proper gamete combination placement (assuming gametes are \(D\) and \(d\) from each parent).

Answer:

d.