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Unformatted text preview: The gene is called cistron-1. It has two alleles, one (called Cistron-1-S) that codes for slow reverse-transcription, and the other (called Cistron-1-F) codes for fast reverse-transcription. 51) If an individual virus (described above) was sequenced and found to carry the allele for fast reverse- transcription, then: a) The genotype of the virus is Cistron-1 b) The phenotype of the virus is reverse transcriptase c) The genotype of the virus is fast reverse transcription d) The phenotype of the virus is Cistron-1-F e) The genotype of the virus is Cistron-1-F Use the information below for the following four questions (until you see a bar beneath the question) Two types of haploid-annual-asexual seeds ( genotype-B producing blue-flowers and genotype-R producing red-flowers) were planted during the Spring on a small remote island. Only one gene in the genome codes for flower color. The numbers of seeds planted in the Spring of generation-1 were 50 genotype-B and 150 genotype-R . The next Spring (the beginning of generation-2) all of the seeds produced from the previous year were collected and grown in a greenhouse to determine flower color. These flower colors were 300 red and 300 blue . 52) The Darwinian fitness of genotype-B was: a) 250 d) 300 b) 1 e) none of these answers c) 6 53) The change in the gene pool frequency of the red flower color allele after one generation of natural selection was: a) +50% d)-25% b)-50% e) none of these answers c) +25% 54) The relative fitness of genotype-R is: a) 2 d) 1.0 b) 0.5 e) none of these answers c) 0.33 55) Suppose that the same experiment was carried out on a different island. On this island, data was only collected for survival: the survival of genotype-B was 25% and that of genotype-R was 50%. The genotype on this island that was the best "gene transport machine is: a) genotype-R d) both genotype -R and Genotype-B b) genotype-B e) neither genotype-R nor genotype-B c) too little information to decide Use the information below for the following four questions (until you see a bar beneath the question) A population of asexual dandelions has four genetic variants (genotypes): yellow and large flowers (Y/L), yellow and small flowers(Y/S), white and large flowers (W/L) and white and small flower (W/S). The frequencies of the four types in the Spring of 2005 (just before the seeds begin to germinate) were: 500 Y/L, 200 Y/S, 200 W/L, and 100 W/S. The frequencies in 2006 measured at the same time as 2005 were: 750 Y/L, 100 Y/S, and 50 W/L, and 100 W/S. 56) The estimated Darwinian fitness of the genotype with yellow and small flowers is: a) 0.25 d) 1.5 b) 0.5 e) None of these answer is correct c) 1.0 57) The average fitness of the population is: ( hint: this can be calculated without calculating the fitness of all of the genotypes ): a) 0.25 d) 1.5 b) 0.5 e) None of these answer is correct c) 1.0 58) The change in the gene pool frequency of the Y/S genotype after one generation of natural selection was: a) 0.0 d)-0.5 b) 0.1 e) None of these answers is correct c)-0.1 59) The fitness of the...
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