9:45 PM 1 * 5316 Sprint LTE lab015exp005.doc Population Genetics Experiment 5: S
ID: 134411 • Letter: 9
Question
9:45 PM 1 * 5316 Sprint LTE lab015exp005.doc Population Genetics Experiment 5: Sickle Cell Anemia Inheritance Patterns Sickle cell anemia is a genetic disease (one base pair mutation that cha protein). It is more common in those of African ancestry. In this experime will represent the normal dominant allele and "s" the recessive sickle allel are co-dominant alleles SS is normal, Ss is not fatal, ss is debilitating, p and often fatal. Materials (1) 100 mL Beaker Red Beads Blue Beads Procedure 1. Place 25 red (S) and 25 blue (s) beads into the 100 mL beaker and mix well. 2. Randomly (without looking) remove two beads. Repeat 10 times (without returning the beads to the beaker), each time recording if it was a SS, Ss or ss. 3. Remove each ss from the population - they died. 4. The remaining beads survived and reproduced. s. Count how many red and blue beads remained (separately) and place twice that number back in the beaker 6. Repeat the process seven times Post-Lab Questions 1. What is the remaining ratio of alleles? 2. Have any been selected against? Open With ? PrintExplanation / Answer
1) The proportion of red beads will increase over blue beads.
2) The blue beads will be selected against.
3) The alleles will not disappear completely from the population because the heterozygous allele combinations provide a survival advantage in malaria endemic areas.
4) The results would be same even if started with a larger or smaller population.
5) Since the sickle cell allele provides survival advantage in malaria endemic areas, it's proportion remains same for several generations in the African population.
6) Since sickle cell allele prevents or reduces the effect of malaria, there is a close correlation between their distributions.
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.