ONLY for "HELPCLICK"...Biology Lab #1_FALL

Hardy Weinberg Virtual Lab Notes

Access: http://www.phschool.com/science/biology_place/labbench/lab8/intro.html

Use this outline to take notes prior to attempting the online lab report.

1. What is the purpose of H-W? (3 points)

2. In order for the H-W to be valid (useable), what conditions have to be in effect (or not in effect?) (5 points)

3. Briefly describe the five conditions and how they DO cause allelic frequency changes in a population (and would thus disrupt H-W). (15 points)

4. The allele for black coat is recessive to the allele for white coat. Can you count the number of recessive alleles in this population? Please explain. (7 points)

5. Proceed to use the H-W equation to calculate the allelic frequencies.  Continue to practice several of the problems. Once you are comfortable with the H-W problems, solve these on your own:

a. There are 100 students in a class. Ninety-four (94) did well in the course whereas six (6) received a grade of F. In the highly unlikely event that these traits are genetic rather than environmental, if these traits involve dominant and recessive alleles, and if the six (6%) represent the frequency of the homozygous recessive condition, please calculate the following:

1. The frequency of the recessive allele. 

2. The frequency of the dominant allele. 

3. The frequency of heterozygous individuals.

6. Within a population of beetles, the color brown (B) is dominant over the color green (b). And, 40% of all beetles are green. Given this simple information, calculate the following:

a. The percentage of butterflies in the population which are heterozygous.

b. The frequency of homozygous dominant individuals.