Genetics worksheet with answers

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

1. 1T × t
2. 2T × T
3. 3t × t
4. 4t × T

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 has white flowers?

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, round 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 yellow seeds (dominant) or green seeds; gene B gives black fur (dominant) or white fur. Click the one cell for an offspring that is homozygous for yellow seeds and for black fur.

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 round seeds (dominant) or wrinkled seeds; gene B gives tall plants (dominant) or short plants. Click the one cell for an offspring that is homozygous for round seeds and shows short 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