7. Why was it appropriate to use a line graph to summarize the results from this experiment?  

20. Hemophilia is a sex-linked recessive trait in humans. If a father and a son are both hemophiliacs, but the mother is normal, the daughter’s  genotype must be:

32. Which one of the following is not an agent of natural evolutionary change? 

6. How would you test whether the ancient Nevada lake contained predatory fish?

13. In this virtual lab, why did you compare pelvic structures of stickleback populations from two different lakes?

25. What is the name of the syndrome that is an intersex condition characterized by the presence of 45 chromosomes in the nucleus, where only 1 X chromosome is observed?

38. If one assumes that Hardy-Weinberg equilibrium applies to the population of colonists on this planet (100 people with attached earlobes), about how many people will have attached earlobes when the planet’s population reaches 10,000?    

18. What is the purpose of looking for evidence of left or right bias in pelvic asymmetry in stickleback populations?

36. In a Hardy-Weinberg population with two alleles, A and a, that are in equilibrium, the frequency of allele a is 0.1. What is the percentage of the population that is heterozygous for this allele?

37. You sample a population of butterflies and find that 42% are heterozygous at a particular locus. What should be the frequency of the recessive allele in this population?