Genetics worksheet with answers

Two Bb parents are crossed. B gives purple flowers and is dominant over b, which gives white flowers. Click the cell for an offspring that has purple flowers and is homozygous.

1. 1b × b
2. 2b × B
3. 3B × b
4. 4B × B

Two Bb parents are crossed. B gives yellow seeds and is dominant over b, which gives green seeds. Click the cell of the Punnett square for an offspring with green seeds.

1. 1b × B
2. 2b × b
3. 3B × B
4. 4B × b

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?

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 black fur (dominant) or white fur. Click the one cell for an offspring that is shows both wrinkled 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

In a population of 10000 in Hardy–Weinberg equilibrium, 4% show a recessive trait. How many individuals N are expected to be homozygous dominant?