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

Two Aa parents are crossed. A gives round seeds and is dominant over a, which gives wrinkled seeds. Click the cell of the Punnett square for an offspring with wrinkled seeds.

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 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 tall, wrinkled seeds?

In a population of 2000 in Hardy–Weinberg equilibrium, 1% show a recessive trait. How many individuals N are expected to be homozygous dominant?

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