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A human male working in a government chemical testing lab is not able to produce viable sperm. His doctor suspects one of the chemicals he is exposed to is limiting his gamete development. The doctor examines the gametes resulting from meiosis and discovers all resulting cells maintain their chromosomes in tetrads. What chromosome number is the doctor seeing and what is the total chromatid number found. Considering the nuclear membrane has dissolved and the chromosomes are not found at the metaphase plate; propose a mechanism by which the chemical is disrupting meiosis.
Environmental Carcinogens mutagens and other environmental carcinogens UV light organic solvents high energy radiation asbestos tobacco smoke others factors? What does UV light do to a cell.
Programs have been established to supply food from Western nations to starving people in Africa. Some people argue that such food programs, which may have short term benefits, actually increase the threat of starvation in the future. What are the ..
Based on the general permeability equation, net flux of solute across a cell membrane, Jnet (gm/sec), is proportional to the permeability coefficient, P,
On average what proportion of cells would you expect to be inmetaphase? What is the probability of seeing at least one metaphase?
Describe the deficiency/toxicity relationship of trace minerals and why other nutrients do not have similar toxicity conditions.
Describe the noncyclic electron pathway. Explain what cells do this process, where it occurs, what happens during the process and what is produced.
What would be TRC for a male with the genotype AABbCcDD? For a female. In contrast, each dominant allele in an individual's genotype contributes 12 ridges to the TRC in males and 10 ridges to the TRC in females.
The "Primordial soup" includes the mixture of elements and gases which are thought to have started life on the Earth. Based upon what you have learned related to the cells and complex molecules, do you feel this theory makes sense?
At one point Watson proposed a model in which like bases paired with like- C-C, T-T, G-G and A-A. Describe why this model fails to explain Chargaff's data. Since X-ray diffraction data indicate that the DNA helix is of uniform width, what addition..
Assume that the blue eyes in both families were caused by mutations in the same gene, and that there were no new mutations within the pedigrees
Give a general overview of the steps involved in transcription and RNA processing including the purposes of eukaryotic RNA polymerase II requiring general transcription factors to initiate transcription and its phosphorylation?
How are barbituratesprepared? Give an example of anSSRI and a tricyclic antidepressant.Plese explain for help forexam
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