Genetics worksheet with answers

Two Tt parents are crossed. T gives tall plants and is dominant over t, which gives short plants. Click the cell of the Punnett square for an offspring with short plants.

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

Two Aa parents are crossed. A gives black fur and is dominant over a, which gives white fur. Click the cell for an offspring that has black fur 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 tall, 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, round seeds?

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

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