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- 1.If the AaBBCc individual will be test-crossed, what is the probability that the resulting offspring will show all the recessive traits? a.three-fourth b.zero c.nine-sixteenth d.one-sixteenth 2. Who conclusively demonstrated that the substance responsible for the transformation of non-virulent Streptococcus pneumoniae to virulent S. pneumoniae is the DNA? a.Frederick Griffith b.Hershey and Chase c.Watson and Crick d.Avery, MacLeod, and McCarthy1. a) If you were at risk of a fatal disease such as Huntington’s disease and only the 95% accurate preliminary genetic test was available, would you take the test? After all, 95% of the time the test would tell you whether you would eventually get Huntington’s disease or whether you did not have to worry about getting this disease. b) The linkage distance between the DNA sequence used in the test and the actual Huntington’ disease locus was 5%. In a large sample of the Venezuelan family, what percentage of people would inherit the DNA sequence but not the Huntington’s allele (i.e. be a false positive test for Huntington’s)? What percentage of that large Venezuelan family would not inherit the DNA sequence but would inherit the Huntington’s allele (i.e., be a false negative test for Huntington’s)?2)A,B,C, and D are genes linked on the same chromosome. Given the following recombination frequencies, what is the gene order? A-B 15%, B-C 26%, C-D 30%, A-C 11%,A-D 19%, and B-D 4%.
- 1.a) With the aid of annotated diagrams differentiate between incomplete dominance, complete dominance and codominance b) List and explain the 5 modes of inheritance in pedigree analysis c) With the aid of illustrative diagrams explain the three theories of DNA replication d) Discuss the impact of COVID-19 pandemic on ecosystems.14. a)What is the complementary strand of TTGACAGTAAAA? b)List the possible genotypes for an individual with type A blood. c)How many chromosomes are in human beings?Use the probability method to calculate the genotypes and genotypic proportions of a cross between AABBCc and Aabbcc parents.
- A geneticist identifies 117 recombinant offspring out of a total of 1,359. What is the recombination frequency?20. 20.Which among the following statements is INCORRECT? A. Codominance is evident when a cross between organisms with two different phenotypes produces offspring that exhibits both parental traits because the alleles for each trait are neither completely dominant nor recessive B. Incomplete dominance is evident when a cross between a white carnation and a red carnation results in a pink carnation flower. C. Law of dominance state that if the alleles of a specific gene differ from each other, only one phenotype will be expressed while the other is masked D. The inheritance of one trait does not affect the inheritance of the other trait especially if the allele of the other trait is located in a different chromosomeExplain the following pairs of concepts and briefly describe their major difference(s) 1. Recombination fraction & genetic distance.
- 31. A great deal of current molecular genetic research is focused on: A) the 97 percent of the human genome that is known to code for proteins B) the 20 percent of the human genome that is known to code for proteins C) the 3 percent of the human genome that is known to code for proteins D) the 1.5 percent of the human genome that is known to code for proteinsDo you think it is a good thing that the recombination process occurs in the human population? Why?1. a. Examine the following image showing the results of an ALU insert gel-like. The first lane is the molecular marker. How many + alleles are represented in lanes 2-8? Assume each lane is an individual's amplified diploid DNA. b.The first lane is the molecular marker. How many - alleles are represented in lanes 2-8? Assume each lane is an individual's amplified diploid DNA. c.The first lane is the molecular marker. If lanes 2-8 represent the seven students in the class, what is the frequency of the + allele in this small population? d. If this gel represents the genotypes of all 7 students in a class, what is the EXPECTED number of people that would have a +/+ genotype if this small population were in Hardy-Weinberg equilibrium? (To nearest tenth)