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

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

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