A woman whose mother is color blind and whose father has hemophilia A is pregnant with a boy. If the alleles for color blindness and hemophilia A are rare in the population, what is the probability that the baby will have normal vision and normal blood clotting?
In humans, the genes for red-green color blindness (R = normal, r = color blind) and hemophilia A (H = normal, h = hemophilia) are both X-linked and only 3 map units apart.
A) 0
B) 0.03
C) 0.485
D) 0.47
E) 0.015
E) 0.015
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A plant seedling bends toward sunlight because _____
A) auxin migrates to the lower part of the stem due to gravity B) there is more auxin on the light side of the stem C) auxin is destroyed more quickly on the dark side of the stem D) auxin is found in greatest abundance on the dark side of the stem E) gibberellins produced at the stem tip cause phototropism
The movement of substances to regions of lower concentration is called
A. active transport. B. diffusion. C. pinocytosis. D. pumping. E. exocytosis.
What nonendocrine organ produces erythropoietin, which stimulates red blood cell production in the bone marrow?
A. kidneys B. skin C. heart D. pituitary E. liver
Protein in plasma membranes that has an attached carbohydrate chain; assembled in the Golgi apparatus.
What will be an ideal response?