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In Drosophila, vermilion eye color is due to a recessive allele (v) located on the X chromosome. Curved wings is due to a recessive allele (cu) located on one autosome, and ebony body is due to a recessive allele (e) located on another autosome. A vermillion male is mated to […]

A man’s maternal grandmother had normal vision; his maternal grandfather was color-blind; his mother is color-blind; his father is of normal vision. What are the genotypes, as to vision, of the two parents and grandparents mentioned? What types of vision has the man himself? What types of vision would his […]

A 58-year-ld man with chronic alcoholism presents with abdominal pain, fever, and hematemesis. Laboratory studies showed elevated serum levels of liver enzymes (AST, ALT) and decreased serum albumin (2.2 g/dL) the patient dies of bleeding esophageal varies. At autopsy, the patient%u2019s testacies are small and brown. By microscopy, there is […]

The plasma membranes of polarized epithelial cells, such as those found in thetubules of the nephrons in the kidney, are divided into apical and basolateraldomains. How are these two domains different and how do the differencesarise? How do transmembrane proteins affect the function of epithelial cells inthe proximal convoluted tubule(PCT)? […]