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a. Give one reason why genes may not follow Mendel’s 2nd Principle. Explain clearly. b. What is meant by the term double crossover as it relates to recombinant progeny. Explain your answer by giving the genotype of parental chromosomes and those chromosomes showing a double crossover event. c. If the […]

1. Somatic hypermutation of antibody variable regions can occur during an immune response. It allows daughter cells to produce antibodies with a slightly different V region than the parent cell. Give one reason why this might be important for the efficacy of the antibody response. Explain why mutations of the […]

1. Cystic fibrosis is a chronic lung and digestive disease caused by a mutation in the CFTR gene on chromosome 7. In the United States approximately 39 in 10,000 individuals are affected with the recessive condition cystic fibrosis, 323 in 10,000 individuals are unaffected carriers, and 9,638 out of 10,000 […]

Suppose you infect E. coli cells with two strains of T4 virus. One strain is minute (m), rapid lysis (r) and turbid (t); the other is wild-type for all three markers. The lytic products of this dual infection are plated on a lawn of E. coli and the morphology of […]