Which of the following types of physical mutagens produces thymine dimer mutations?
A. ultraviolet light
B. X-rays
C. microwave
D. gamma rays
E. ionizing radiation
A. ultraviolet light
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The cardiac, pyloric, anal, and ileocecal sphincters are all part of the
(a) digestive tract. (b) respiratory tract. (c) circulatory system. (d) muscular system.
Therapies using stem cells are already used in:
A. bone marrow transplantation. B. treating Parkinson's disease. C. treating Alzheimer's disease. D. All three of these choices are correct. E. None of these choices are correct.
The smallest and most numerous blood vessels in the body are the
a. venules b. veins c. arteries d. capillaries
If the two parents are each heterozygous for widow's peak and having freckles, what is the chance that any of their children will have the same phenotype?
A) 1/16 B) 1/2 C) 3/16 D) 9/16