1b. Artificial selection occurs when  a. the extremes of a population have a better chance to survive b. humans determine which organisms will survive and reproduce c. the organisms on one extreme of the population will have a better chance to survive than those on the other extreme d. the environment controls which organisms will survive

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Assume two alleles A1 and A2 with known frequencies e.g. p (A1) = 0.7, q (A2)= 0.3 What would be the frequency of the A1A2 ? a. 0.49 b. 0.09 c. 0.21 d. 0.42

Which of the following types of selection maintain variation in a population?   a. Overdominance (Heterozygote advantage)   b. Underdominance (Heterozygote disadvantage)   c. Frequency-dependent selection   d. Directional selection   e. Both a. & b.    f. Both a. and c.    g. Both a. and d.

3.) In a population that is in Hardy-Weinberg equilibrium, 45 % of the individuals arehomozygous recessive for a certain trait. In a population of 15,500, how many of the individualswill be;a. homozygous dominant individualsb. heterozygous individuals

9. Two lizard populations were found on opposite sides of a mountain. On a particular gene A, the following genotypes (together with the corresponding frequencies) were observed: AA Aa aa Population 1 38 Population 2 0 44 18 80 20 a. Calculate the frequencies of A and a in the two populations. а. b. Calculate and establish if either of the two populations appear to be at Hardy-Weinberg equilibrium. c. A huge flood opened a canyon in the mountain previously separating population 1 and 2. They were then able to migrate such that the two populations mixed completely and mated at random. Determine the genotype frequency of the next generation of the new combined population.

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