Answers.HW

Population Genetics & Evolution
Hardy-Weinberg Answers

     H-W Review Answers:

     1.  Brown eyes are represented by the p allele because they are dominant.

     2. Blue eyes are represented by the q allele because they are recessive.

     q² = (18/200) = 9% = 0.09
     q = 0.3

     p + q = 1
     p = 0.7

     p²= 0.49
     2pq = (2 * 0.7 * 0.3) = 0.42
     q² = 0.09

     p² + 2pq + q² = ?
     0.49 + 0.42 + 0.09 = 1 Correct Answer!

     3. The allelic frequency (p) for brown eyes is 0.7.

     4. The allelic frequency (q) for blue eyes is 0.3.

     5. The genotypic frequency for homozygous dominant brown eyes is 0.49.

     6. The genotypic frequency for heterozygous brown eyes is 0.42.

     7. The genotypic frequency for homozygous blue eyes is 0.09.

     8. False - Populations must be large for H-W equilibrium to prevent genetic drift, which has drastic effects on small populations. Gene flow can happen to any size population.

     9. True - No selective pressure can exist for H-W equilibrium to be in effect.

     10. False - Individuals cannot evolve. Only populations have this potential.

If you have a question on anything you encountered in the above questions or the Hardy-Weinberg Information in general, please Ask me.