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Color blindness is an X-linked recessive trait. A color-blind man has a daughter with normal color vision. The daughter marries a man who has normal color vision. What is the expected phenotypic ratio of their children? A) 1 normal vision female: 1 color-blind male B) 3 normal vision females: 1 […]

Using a five step protocol, you have purified an enzyme to the point where the specific activity remains constant when you perform any additional purification steps. When you run the purified enzyme on a gel filtration chromatography column, you find it has a molecular mass of 50 kD. However, when […]

Human Population Growth and the Environment Describe the historical pattern of growth of the worldwide human population since our origin. Include in this historic overview the changes that have happened technologically, medically, culturally and nutritionally to result in major population changes over time. Relate the growth of the human population […]

A protein has a molecular mass of 200 kDa as determined by gel filtration (=native molecular weight). When separated by SDS-PAGE (without a reducing agent present) only one polypeptide appeared with a mass corresponding to 100 kDa. When determined by SDS-PAGE in combination with a reducing agent (DTT) exactly two […]