Lecture activity 11 part 2:
1. Label the following statements as true or false
A. The theory of evolution by natural selection says that an individual competes for
resources and will evolve during their lifetime to be better suited to their environment,
B. Evolution is not goal directed- mutations are random and natural selection can only act
on the variation that exists within a population
C. If the environment changes, different traits may become more favorable
2. A new species of hummingbirds is discovered deep in the Amazon rainforest. A scientist
wants to determine how closely related it is to other species of hummingbirds that live in South
America. She examines the bone structure of the wings and the feather pattern of the new
hummingbird species and compares them to other species of hummingbirds. What type of
analysis is she doing? What other methods could she use to compare the different species of
hummingbirds?
3. What 5 conditions must be met for a population to be in Hardy-Weinberg equilibrium?
4. In a population of butterflies, red wings (R) are dominant to white wings (r). If the r allele is
measured to be at a frequency of .2 in a population in H-W equilibrium, what is the frequency
of the R allele?
5. In the population of butterflies, what is the frequency of white winged-butterflies (rr)? What
is the frequency of red-winged butterflies that are homozygous dominant (RR)?
6. 2. If the frequency of two alleles in a gene pool is A=.9 and a=.1, what is the frequency of
individuals in the population with the genotype Aa?
