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 round seeds and is dominant over a, which gives wrinkled seeds. Click the cell for an offspring that has round seeds 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, 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 purple flowers (dominant) or white flowers. Click the one cell for an offspring that is shows both green seeds and 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

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