Genetics worksheet with answers

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

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

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 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?

A recessive condition affects 1 in 2500 of a population in Hardy–Weinberg equilibrium. What fraction f of the population are carriers (heterozygous)?

Two AaBb parents are crossed. Gene A gives round seeds (dominant) or wrinkled seeds; gene B gives yellow seeds (dominant) or green seeds. Click the one cell for an offspring that is shows both wrinkled seeds and green 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