Genetics worksheet with answers

Two Tt parents are crossed. T gives yellow seeds and is dominant over t, which gives green seeds. Click the cell for an offspring that has yellow seeds and is homozygous.

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

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 short, 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 short, round seeds?

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 wrinkled seeds and is homozygous for yellow 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

In a population of 10000 in Hardy–Weinberg equilibrium, 9% show a recessive trait. How many individuals N are expected to be homozygous dominant?