Genetics worksheet with answers

In pea plants, purple flowers (A) are dominant over white (a). A plant with genotype Aa is crossed with a plant with genotype aa. What is the probability P that an offspring is heterozygous (Aa)?

Two Aa parents are crossed. A gives purple flowers and is dominant over a, which gives white flowers. Click the cell for an offspring that has purple flowers and is homozygous.

1. 1A × A
2. 2A × a
3. 3a × A
4. 4a × a

Tall (A) is dominant over short (a), and round seeds (B) over wrinkled (b). The genes are on different chromosomes. For the cross AaBb × AaBb, what is the probability P that an offspring is short, wrinkled seeds?

Tall (A) is dominant over short (a), and round seeds (B) over wrinkled (b). The genes are on different chromosomes. For the cross AaBb × Aabb, what is the probability P that an offspring is short, wrinkled seeds?

Two AaBb parents are crossed. Gene A gives round seeds (dominant) or wrinkled seeds; gene B gives tall plants (dominant) or short plants. Click the one cell for an offspring that is shows wrinkled seeds and is homozygous for tall plants.

1. 1ab × Ab
2. 2ab × AB
3. 3ab × aB
4. 4ab × ab
5. 5AB × Ab
6. 6AB × AB
7. 7AB × aB
8. 8AB × ab
9. 9aB × Ab
10. 10aB × AB
11. 11aB × aB
12. 12aB × ab
13. 13Ab × Ab
14. 14Ab × AB
15. 15Ab × aB
16. 16Ab × ab

Two AaBb parents are crossed. Gene A gives tall plants (dominant) or short plants; gene B gives purple flowers (dominant) or white flowers. Click the one cell for an offspring that is shows short plants and is homozygous for purple flowers.

1. 1aB × AB
2. 2aB × Ab
3. 3aB × aB
4. 4aB × ab
5. 5ab × AB
6. 6ab × Ab
7. 7ab × aB
8. 8ab × ab
9. 9Ab × AB
10. 10Ab × Ab
11. 11Ab × aB
12. 12Ab × ab
13. 13AB × AB
14. 14AB × Ab
15. 15AB × aB
16. 16AB × ab