Tuesday, November 25, 2008

Natural Selection Lab: Breeding Bunnies

  • please submit your lab on Monday, December 1st
  • include the following sections:
    Hypothesis, Data and Observations, Data Analysis, Conclusion and Evaluation

Monday, November 24, 2008

Flashy Fish simulation

  • to complete this activity, please ensure you have the 2 handouts from your teacher
  • then, click on the following link: Flashy Fish

Graphing Tutorial

Natural Selection Lab: Breeding Bunnies

  • please submit your lab on Monday, December 1st
  • include the following sections:
  • Hypothesis, Data and Observations, Data Analysis, Conclusion and Evaluation

Thursday, November 20, 2008

Natural Selection Questions

  • please complete the questions on the handout distributed in class today

Tuesday, November 18, 2008

Hardy Weinberg Practice Quiz

Hardy-Weinberg practice and solutions

  • Here are the answers to #3 on page 650 from your text:
  • a) i) SA 0 0.6 and SB 0 0.4 (because if mating is random, the frequencies shouldn´t change)
  • ii) SASA =0.36 x 175 = 63, SASB = 0.48 x 175 = 84 individuals, SBSB = 0.16 x 175 = 28 individuals
  • b) i) they have misshapen red blood cells which cannot properly bind oxygen, therefore they have very little energy
  • ii) The allele remains in the population because of the heterozygous advantage, which means that heterozygotes for sickle cell anemia are protected against malaria.
  • c) i) Sickle cell anemia is caused by a point mutation, affecting only one base! This mutation is located in the gene that codes for hemoglobin.
  • ii) Due to independent segregation, there is 50 percent chance that a heterozygote will pass on the sickle cell allele to their offspring.
  • d) don´t worry about part d yet..we will cover the topic of directional selection in a future class

Friday, November 14, 2008

Hardy-Weinberg Quiz

  • you will have a quiz on hardy weinberg problems on Thursday of next week