Genetics worksheet with answers

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

1. 1A × A
2. 2A × a
3. 3a × A
4. 4a × a

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, 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 tall, wrinkled seeds?

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

In a population of 5000 in Hardy–Weinberg equilibrium, 16% show a recessive trait. How many individuals N are expected to be homozygous dominant?