Genetics worksheet with answers

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

1. 1r × R
2. 2r × r
3. 3R × R
4. 4R × r

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

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