Occasionally, chromosomes fail to separate during meiosis, leading to daughter cells that have an abnormal number of chromosomes. This phenomenon is called
A. epistasis.
B. nondisjunction.
C. crossing over.
D. pleiotropy.
E. chromosome inactivation.
B. nondisjunction.
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A) A B) B C) C D) D E) E
Which of the following distinguishes terrestrial biomes from one another?
a. Plant diversity b. Precipitation c. Mountain ranges d. Animal diversity
In the United States, the parasite that causes malaria is not present, but African-Americans whose ancestors were from equatorial Africa are present
What should be happening to the sickle-cell allele in the United States, and what should be happening to it in equatorial Africa? A) stabilizing selection; disruptive selection B) disruptive selection; stabilizing selection C) directional selection; disruptive selection D) directional selection; stabilizing selection
Embryonic stem cell research may be conducted on what some hospitals and clinics consider biological waste products
Indicate if this statement is true or false?