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Q1. The position of flower on the stem of the garden pea is governed by a pair of alleles. Flowers growing axils (upper angle between petiole and stem) are produced by the action of the dominant allele T, those growing only at the top of the stem by its recessive allele t. Coloured flowered are formed by a dominant gene C and white flowers by its recessive allele c. A dihybrid plant with coloured flowers in the axils is crossed to a pure breeding strain of the same phenotype. What genotypic and phenotypic ratios are expected in the F1 progeny?
Q2. Hydrogen peroxide (h2o2) breaks down into water and oxygen. Explain why this is a chemical reaction. What are reactants and products in the reaction?
Mrs. Mulligan goes to her dentist and, after having a couple of cavities filled, her dentist strongly suggests that she reduce her intake of sodas and increase her intake of calcium phosphates in the foods she eats. Why give appropriate reasons.
A mammal uses only one to two percent of its energy in ventilation as a fish must spend about 15 percent of its energy to move water over its gills. Explain this huge difference in their efforts to collect oxygen.
Plants lacking this enzyme grow slowly and are often light green or white in colour. Provide explanations with support for both these plants' slow growth rates and light-green or white appearance.
The bacteria are allowed to grow overnight and are streaked on a plate using the technique that produces isolated colonies that are clones of the original. Samples of these colonies are then grown in four different media: nutrient broth plus ampicill..
Explain this dosage strategy in terms of the negative feedback control of cortisol secretion and receptor function in hormonal pathways.
What effect do you think EBV would have on B cell function. What phenotypes would you expect in the F2, and in what actual numbers (not ratios) will you expect to find out them.
What are the roles of plasmodesmata and aquaporins. In the presence of the galactose derivative 6-O-benzyl-D-galactose, the curve is shifted to the right. What variety of agent is 6-O-benzyl-D-galactose.
Write down 1X4 matrices, P, G, and M that represent the nutritional values of each food. Then find 3P+2G+2M and tell what the entries represent.
Do you think biochemical testing must be recommended to detect the deleterious gene in Mrs. Lehman. Which one increased their alveolar ventilation, or do they stay the same? Why with appropriate reason.
Explain how tail length is inherited. Indicate how many gene pairs are at work and designate the genotypes of the two parents and lf the F1 offspring.
How denaturing a protein alters the functions of that protein. If we are bleeding by the accident, why the injury has to be deeper than epidermis.
What information does it not provide that may be useful for deciding on conservation efforts. What are the genotypes of the parents.
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