Question: Assume you have made a collection of mutant fruit flies that aredefective in various aspects of DNA repair. You test each mutantfor its hypersensitivity to three DNA-damaging agents: sunlight,methylnitrosourea (which cause alkation of guanosine),and nitrous acid (which causes deamination of cytosineand conversion to uracil which lead to a mutation and […]

1. For each replication of activity 13.1 in which you determine the type of gamete genotypes from a particular parent, write out the parental genotype followed by its gamete genotypes. 2. When allele A is dominant over allele A’, write out the parental phenotypes and genotypes. Then write out the […]

Estrogen and testosterone are both produced in the male body. Unlike in the female body, breast tissue in a normally developing male does not become enlarged in response to normal estrogen levels. Which statement explains why? A. When bound to estrogen, male estrogen receptors in breast cells do not signal […]

Niremberg used the enzyme polynucleotide phosphorylase to assemble RNAs with random sequences in the absence of a template. Supposethey added the enzyme to a solution of 90%CTP and 10%UTP, and then used a cell-free system of protein synthesis to make peptidesaccording to the sequences in their synthetic RNAs. a.) Which […]