Lab 4.pdf - Anthony Gambino Amanda Christopher Biological...

Anthony Gambino
Amanda Christopher
Biological Anthropology
9/15/17
Lab 4 (Exercises 1-5)
Exercise 1
Work in a small group or alone to complete this exercise. In Lab 2, Exercise 7, you determined
the amino acid sequence for the following strand of DNa:
That strand has mutated. It is now:
Use your knowledge of mutation and protein synthesis to answer these questions:
1. What mutation has occurred?
2. Will this mutation have a real effect? Why or why not? (Hint: You may want to try
Exercise 8 from Lab 2 again, using the mutated DNA strand to make the mutated
protein.)
Exercise 3
Work in a small group to complete this exercise. You have a cup of beans in front of you with 20
white beans and 20 red beans. These beans represent the alleles for a simple Mendelian trait,
where red is dominant (R) and white is recessive (r). The cup holds the alleles for an entire
population (the gene pool).
Step 1:

Create a population from the gene pool. Randomly pull out pairs of two beans, and lay them out
in front of you. Each pair of beans represents one individual’s genotype for this trait. You should
have a total of 20 pairs of beans (20 individuals in the population). Record the genotypes of the
individuals (pairs of beans) in the first table.
Individual Genotype Individual Genotype
1 Rr 11 Rr
2 RR 12 Rr
3 RR 13 rr
4 Rr 14 RR
5 Rr 15 Rr
6 RR 16 Rr
7 Rr 17 Rr
8 rr 18 rr
9 Rr 19 rr
10 Rr 20 Rr
1. How many recessive alleles are present in your overall population?
2. How many dominant alleles are present in your overall population?