What are the genotypes of the F2 generation?
Punnett Square Crosses
Procedure:
Part 1: Punnett Squares
1. Set up and complete Punnett squares for each of the following crosses: (remember Y = yellow, and y = blue). Please use the following example of a Bb and Bb cross as a guide for filling in your Punnett Squares:
| Bb/Bb | B | b |
| B | BB | Bb |
| b | Bb | bb |
Cross #1:
| YY/Yy | Click here to enter text. | Click here to enter text. |
| Click here to enter text. | Click here to enter text. | Click here to enter text. |
| Click here to enter text. | Click here to enter text. | Click here to enter text. |
Cross #2:
| YY/yy | Click here to enter text. | Click here to enter text. |
| Click here to enter text. | Click here to enter text. | Click here to enter text. |
| Click here to enter text. | Click here to enter text. | Click here to enter text. |
a. What are the resulting phenotypes?
Cross #1: Cross #2:
b. Are there any blue kernels? How can you tell?
2. Set up and complete a Punnett squares for a cross of two of the F1 from Cross #2 (above).
| Click here to enter text. | Click here to enter text. | Click here to enter text. |
| Click here to enter text. | Click here to enter text. | Click here to enter text. |
| Click here to enter text. | Click here to enter text. | Click here to enter text. |
a. What are the genotypes of the F2 generation?
b. What are their phenotypes?
c. Are there more or less blue kernels than in the F1 generation?
3. Identify the four possible gametes produced by the following individuals:
| Individual | YY Ss | Yy Ss |
| Gamete #1 | Click here to enter text. | Click here to enter text. |
| Gamete #2 | Click here to enter text. | Click here to enter text. |
| Gamete #3 | Click here to enter text. | Click here to enter text. |
| Gamete #4 | Click here to enter text. | Click here to enter text. |
a. List the genotypes of the F1 generation that result from a cross of these two individuals.
b. What are the phenotypes of the F1 generation? What is the ratio of those phenotypes?