Question

in your textbook, read about punnett squares.
complete the punnett square by filling in the missing information.
a student crossed true - breeding pea plants that had purple
flowers (p) with true - breeding pea plants that had white
flowers (p). all of the offspring had purple flowers. then
the student crossed two plants from the f₁ generation. the
students punnett square is shown at right. what information
should the student put in each blank? remember, the
dominant allele is always written first.
possible

1. — gametes
2. —

10.
11.
12.

Explanation:

Step1: Determine the gametes of the F1 generation

Since the F1 generation has all purple flowers (Pp), the possible gametes are \( P \) and \( p \). So for question 8, it is \( P \).

Step2: Fill in the Punnett square

When crossing \( Pp\times Pp \), for the top - right cell (question 9), the gamete from one parent is \( p \) (already given in the left - hand side of the Punnett square) and from the other parent (top - row) is \( P \), so it is \( Pp \). For the bottom - left cell (question 12), the gamete from one parent is \( P \) (left - hand side) and from the other parent (bottom - row) is \( p \), so it is \( Pp \). For the bottom - right cell (question 11), the gamete from both parents is \( p \), so it is \( pp \). For the top - left cell (question 10), the gamete from both parents is \( P \), so it is \( PP \).

Answer:

1. \( P \)
2. \( Pp \)
3. \( PP \)
4. \( pp \)
5. \( Pp \)