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 Bb parents are crossed. B gives yellow seeds and is dominant over b, which gives green seeds. Click the cell of the Punnett square for an offspring with green seeds.

1. 1B × b
2. 2B × B
3. 3b × b
4. 4b × B

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

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 round seeds (dominant) or wrinkled seeds. Click the one cell for an offspring that is shows both short plants and wrinkled seeds.

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