If one person in 50 is a carrier of an autosomal recessive disorder in a population, the chance that an unrelated man and woman are both carriers is
A) 1/50.
B) 1/100.
C) 1/1000.
D) 1/2500.
D) 1/2500.
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Scientists attempted for many years to conduct nuclear transplants but failed. However, geneticists had success in cloning a sheep. They were successful because they
A. picked a cell very early in development. B. replicated the blastomeres before insertion. C. delayed transcription in the blastomeres. D. treated the nucleus with sheep plasma before nuclear insertion. E. utilized a new micro pipette technique.
Who discovered that DNA was the genetic material or transforming factor that could convert nonvirulent R-type Streptococcus pneumoniae bacterium to the virulent S-type?
A. Weismann and Nageli. B. Griffith. C. Avery, MacLeod, and McCarty. D. Hershey and Chase. E. Watson, Crick, Wilkins, and Franklin.
The figure above represents
a. the algae that were to give rise to plants. b. protists. c. fungi. d. soil bacterium with primitive membrane folds. e. all of these.
Populations inhabiting favorable environments at low population densities typically experience ________ population growth, resulting in a continuously accelerating rate of population increase
Fill in the blank(s) with correct word