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 has purple flowers?

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)?

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, round seeds?

Two AaBb parents are crossed. Gene A gives round seeds (dominant) or wrinkled seeds; gene B gives black fur (dominant) or white fur. Click the one cell for an offspring that is shows wrinkled seeds and is homozygous 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 purple flowers (dominant) or white flowers. Click the one cell for an offspring that is homozygous for round seeds and shows white 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