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)?

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?

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 tall, round seeds?

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 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

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