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Genes for color blindness and hemophilia are linked on theX-chromosome in humans with a recombination frequency of 30 %. Awoman whose father was a color blind hemophiliac and mother wasnormal with no history of color blindness and hemophilia wants tohave children. The prospective father is normal with no history ofeither […]

Question: A class of environmental science students decided to determine the composition of trees in a forest next to their campus. The students decided to conduct a point-quarter survey. When they reached the study area they found that the east side of the woods was thick with blackberry bushes. The bushes had […]

A genetic mutation occurs that alters the specificity of theGolgi enzyme that phosphorylates mannose residues in theoligosaccharides of glycoproteins. The effect of the mutation issuch that the enzyme now indiscriminately and randomlyphosphorylates mannose residues on all glycoproteins passingthrough the Golgi complex.A. What is the normal roleof this enzyme?B. What is […]

In mice, agouti fur is a dominant trait resulting in individual hairs having a light band of pigment on an otherwise dark hair shaft. A mouse with agouti fur is shown here, along with a mouse with solid color fur, which is the recessive phenotype (A = agouti; a = […]