Genetics worksheet with answers

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?

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?

Duchenne muscular dystrophy is X-linked recessive (allele d). A carrier mother, X^DX^d, has children with an unaffected father, X^DY. The mother's gametes run down the side. Click the cell for an affected son.

1. 1X^d × X^D
2. 2X^d × Y
3. 3X^D × X^D
4. 4X^D × Y

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

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 shows 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