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Q1. Diploid nuclei of ascomycete Neurospora crassa contain 14 chromosomes. A single diploid cell in an ascus will undergo one round of meiosis, followed in each of daughter cells by one round of mitosis, producing a total of eight ascospores.
If a single, diploid G2 nucleus in an ascus contains 400 nanograms (ng) of DNA, then a single ascospore nucleus of this species should contain how much DNA (ng), carried on how many chromosomes?
Q2. In pea plants, allele for purple flowers (P) is dominant to the allele for white flowers (p). In a cross between the purple-flowered plant and the white-flowered plant, all 73 of the offspring plants had purple flowers. Which of the most likely describes the cross?
Retinoblastoma is an eye cancer caused by a dominant allele. A normal female and an affected male have four children: one normal and three affected.
provide an explanation of how bacterial species are defined. clearly state how the concept of a bacterial species differs from that of the biological species concept used with animals and plants.
A corporation has invented a new low-calorie sugar substitute. They wish to determine if the substitute might be carcinogenic, so they use it in the Ames test with Salmonella his mutants.
List and express at least three prokaryotic cellular features that might be targeted in this way to inhibit or kill a bacterial pathogen.
Contrast the somatic and autonomic divisions of the efferent nervous system. Mention at least three characteristics of each.
Which of the following is the best experimental protocol by which to test the preference of an herbivore for one of two plants.
A male volunteer named Conan was passively sensitized with IgE specific for Der f 1. After an intradermal challenge with Der f 1, Conan show a typical skin lesion due to an immediate hypersensitivity reaction.
If you grew that mutant in glucose, lactose, IPTG, and glucose and lactose how would the galactosidase activity differ from an E. coli strain containing a functional lac operon?
germination of fern spores does not require mRNA synthesis for protein synthesis. Propose a mechanism that would allow germination without mRNA synthesis in the spore.
Explain why DNA is the most favorable molecule for genetic material and how RNA compares to it in this respect.
Which statement is false regarding cytotoxic T cells?
The haploid genome contains about 3*10^9 nucleotides. On average, how many DNA fragments would be produced if this DNA was digested with restriction enzyme PstI (a 6-base cutter)? RsaI (a 4-base cutter?) How often would an 8-base cutter cleave?
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