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Question 3. You are a clinician in a small hospital and are monitoring the progression of myclonic epilepsy (MERRF) in twin boys. One twin remains only mildly affected by the condition, but the other twin develops other symptoms of full blown MERRF, including deafness, ragged red muscle fibers, and ataxia (loss of ability to control muscles). Use a diagram that includes chromosomes, genes, alleles to explain the phenotypic dissimilarity in these identical twins. In respect to MERRF what is the genotype of the mother?Question 5. In the following question we are dealing with a diploid organism. You have justisolated a new embryonic lethal mutation (a single mutation in one gene) that is a little peculiarbecause three distinct phenotypes have been associated with this mutation:Phenotype 1: viable, minor anterior deformity.Phenotype 2: more severe than above, anterior defect and is embryonic lethal.Phenotype 3: like phenotype 2 it is an embryonic lethal, but halts development even earlier.They appear in the following crosses:Cross 1: male +/- x female +/- : 1/4 phenotype #1; 3/4 normalCross 2: male +/- x female -/- : 1/2 phenotype #2; 1/2 phenotype #3Cross 3: male -/- x female +/- : 1/2 phenotype #1; 1/2 normalCross 4: male -/- x female -/- : all display phenotype #3a) Explain the difference between phenotype #1 and phenotype #2. Which phenotype represents the maternal effect phase, the zygotic phase and why?b) Why does this gene have both a maternal and a zygotic phase? How does phenotype #3 arise?
What are the primary differences between animal cells, plant cells, and bacteria cells? What chacteristics do they share.
Ed Rivers, a 3rd year medical student, was alone in the hospital ER one night. It was unusually quiet that night, and the resident was getting some much needed sleep.
Think about a diploid organism that has four pairs of chromosomes. If no crossing over occurred, determine how many different gametes could be produced in this organism?
What techniques might be used to characterize the structure and composition of the structure. Which of the follow will the nurse include in her teaching plan for this patient.
These experiments demonstrated that DNA is the genetic material of phage and that protein does not transmit genetic information. Can this same experiment be carried out with 35S and 14C? Describe it.
What advantages do the O-Scale System and the Canadian Physical Activity, Fitness and Lifestyle Approach-Health Body Composition Assessment procedure has in evaluation to percent body fat predictions from skin folded measurements, when used in indivi..
Carotenoids are frequently found in foods that are considered to have antioxidant properties in human nutrition. What related function do they have in plants.
Explain anaerobic respiration in terms of an electron transport chain, proton motive force, electron donors and acceptors.
If a double heterozygous plant were crossed with a plant that has green stems and red fruit, what offspring phenotypes would be expected and in what proportions.
A small, impermeable membrane is placed between the anchor cell and the other vulva precursor cells in a larva of C. elegans. What would you expect the result to be.
The structure of biological membranes is estimated primarily by the lipid bilayer but the specific functions of these membranes are carried out through proteins associated with the membrane.
How is sex determined in grasshoppers? Can you find out other examples of organisms with a similar system of sex determination.What syndrome is defined by an XXX genotype.
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