TA Section Name Homework 1 Use your textbook internet or other sources to learn about the organisms in questions 1 4 1 List the advantages and disadvantages to using Escherichia coli as a genetic model organism 2 List the advantages and disadvantages to using domestic cats Felis silvestris catus as a genetic model organism 3 List the advantages and disadvantages to using Mourning Dove Zenaida macroura as a genetic model organism 4 List the advantages and disadvantages to using Kalang Pteropus vampyrus as a genetic model organism GN 311 Fall 2015 Page 1 of 4 Homework 1 Name 5 As you may remember from Biology only the fruiting body of fungi are diploid The generations alternate between a haploid fungus gametophyte and a diploid sporophyte The genus Allomyces is an aquatic fungus and has different chromosomal makeup depending on the species and strain One species A arbuscula has a diploid number of 16 Indicate the number of chromosomes and chromatids for the fungus during the following cell cycle stages Number of Number of Cell Cycle Stage Chromatids Chromosomes Sporophytic Mitotic Prophase Sporophytic G0 Meiosis Prophase II Meiosis Metaphase I Gametophytic G2 6 The carp Cyprinus carpio is a diploid animal with a haploid number of chromosomes equal to 52 Indicate the number of chromosomes and chromatids for the following cell cycle stages Number of Number of Cell Cycle Stage Chromatids Chromosomes Between the first and second meiotic division Gamete Meiotic prophase I Mitotic G2 Normal non dividing cell GN 311 Fall 2015 Page 2 of 4 Homework 1 Name 7 Female Jack jumper ants Myrmecia pilosula are diploid with a haploid number of 2 chromosomes DRAW the chromosomal arrangement in each of the following life stages similar to Figures 1 5 and 1 6 in the Notebook Be sure to indicate which chromosomes are homologous to each other G0 cell Meiotic Prophase I Mitotic prophase Gamete Meiotic prophase II Meiotic G2 GN 311 Fall 2015 Page 3 of 4 Homework 1 Name 8 In rabbits chocolate color is an autosomal recessive trait The dominant allele gives the color black We have a P0 generation with the female rabbit pure breeding homozygous chocolate with the male rabbit pure breeding black They mate and produce several offspring the F1 generation The F1 generation is crossbred to create the F2 generation Create reasonable genetic notation for each of the crosses and list them here Female P0 Male P0 Female F1 Male F1 a Create the Punnett Square for the F2 generation Put the female gametes on the vertical part the left side and the male gametes on the horizontal part the top side Give the chances for the possible genotypes and phenotypes F2 Genotypes with probabilities F2 Phenotypes with probabilities b We are going to do a backcross from an F1 female and a male from the same stock as her mother Give the chances for the possible genotypes and phenotypes F2 Genotypes with probabilities F2 Phenotypes with probabilities Graded Preparation Question 9 A quinoa researcher is interested in the red variant of quinoa She would like to determine if this variant is a Mendelian trait She has taken a pure breeding red strain and crossed it with a pure breeding orange strain The resulting F1 plants are interbred with the following results Phenotype Observed Expected O E Chi square Orange Flower 690 Red Flower 204 Total 894 Statistical Conclusion circle one GN 311 Fall 2015 Reject Hypothesis Page 4 of 4 Fail to Reject Hypothesis Homework 1