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- 1. In pea plants, purple flower color is dominant over white flower color. If you had a purple flowered plant, its genotype could be either PP or _______? A. Pp B. pp C. PP 2. To figure out which genotype your purple plant had, you could do a test cross and mate it with a __________ plant? A. White Flower B. Purple Flower 3. If any of the offspring were white, that would tell you that your mystery purple plant had the genotype __________? A. Pp B. PP C. pp2. A plant has species has a diploid of chromosome number 18. How many chromosome would beexpected in a:a. Triploid? ________b. Trisomic? ________c. Double Trisomic ? ________2.In dogs, there is a hereditary deafness caused by a recessive allele, d. A kennel owner has a male dog that she wants to use for breeding purposes if possible. The dog can hear, but the owner is unsure of the genotype. She does a testcross (crosses it to a homozygous recessive dog), and two of the five offspring are deaf. This means that the male dog A.has the genotype DD B.has the genotype Dd C.is still of unknown genotype since there were offspring of both deaf and hearing phenotypes. D.has the genotype dd
- 5. Why is it possible for a trait that is not present in the present generation to appear in the next generation? Explain briefly.3. You perform a cross between two true-breedingstrains of zucchini. One has green fruit and the otherhas yellow fruit. The F1 plants are all green, butwhen these are crossed, the F2 plants consist of9 green : 7 yellow.a. Explain this result. What were the genotypes of thetwo parental strains?b. Indicate the phenotypes, with frequencies, of theprogeny of a testcross of the F1 plants.c. Describe the epistasis interactions observed.d. Suppose that the dominant alleles specify functional enzymes, and the recessive alleles are nonfunctional. Propose a biochemical pathway thatcould explain the gene interactions.e. Is it possible to cross two different pure-breedingyellow zucchini strains and obtain all green progeny? What would be the genotypes of the parentsand progeny? f. Assuming that wild-type zucchini are green, howwould you describe the phenomenon that occurredin the F1 of part (e)?1. What happens during crossing over? Why is “recombination” an alternative term for what happens during the process of crossing over? Does it occur during mitosis? If so, when? If not, explain why not. Does crossing over occur during meiosis? If so, when? If not, explain why not. How does crossing over influence the genetic diversity of gametes?
- 2) A. Explain how polyribosomes form. B. Why might you expect the insertion of 3 DNA base pairs to be less disruptive than th deletion of a single base pair? C. Compare and contrast mitosis and meiosis with respect to their genetic outcomes? D. What are the possible consequences of non-disjunction during cell division? E. How does meiosis increase genetic diversity in populations?4. If the short-haired cat in the P-Generation were purebred, what would be the genotype for the offspring? What is the ration for EACH phenotype? Use the picture below to answer.1. What are the expected proportions in the offspring? You will need to propose which trait is dominant, either the wild-type or the mutant? 2. Using the chi square calculator to analyze your results. Provide a summary that includes whether you support or reject the hypothesis.
- 2) Discuss the genetic variability introduced by crossing-over and independent assortment. How is this important in sexually reproducing populations? Would these be important in a single-celled organism that reproduces asexually by mitosis?Besides the ones mentioned in this textbook, look for other examplesof variations in euploidy. Perhaps you might look in moreadvanced textbooks concerning population genetics, ecology, etc.Discuss the phenotypic consequences of these changes.1)A researcher crossed a homozygous yellow seed plant (YY) and a heterozygous yellowseed plant (Yy). Draw a Punnett Square and determine the genotype and phenotyperatios of the offspring. please explain it simple and no copypastes thanks