Mary died suddenly of an aortic aneurysm (the sudden bursting of one of the body's largest blood vessels). Which of the following conditions should her children worry most about?
A) Marfan syndrome B) hemophilia C) Turner syndrome D) albinism
Answer: A
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PCR uses two components: ____________________ that serve as templates and primers that bind to regions on either side of the template to be copied
a. yeast artificial chromosomes b. tRNA that has been cut by restriction enzymes c. mRNA that has been cut by restriction enzymes d. double strands of DNA e. single strands of DNA
A color-blind man and a woman with normal vision whose father was color blind have a son. Color
blindness, in this case, is caused by an X-linked recessive gene. If only the male offspring are considered, the probability that their son is color-blind is a. 25 percent. b. 50 percent. c. 75 percent. d. 100 percent. e. 0 percent.
Which of these exhibits radial symmetry?
A) butterfly B) spoon C) snowflake D) shoe box
A table listing such items as age, observed number of organisms alive each year, and life expectancy is known as a (an)
A) life table. B) mortality table. C) survivorship table. D) rate table. E) insurance table.