GGG and GGC are codons for the amino acid, glycine. A mutation caused the insertion of a cytosine in place of the guanine during DNA replication. Over many generations the DNA changes so that the frequency of GGC is similar to that of GGG. What is this phenomenon called?
A. directional selection
B. bottleneck effect
C. stabilizing selection
D. adaptive variation
E. neutral variation
E. neutral variation
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I'm a botanist looking for new species of C4 plants. Where should I focus my search?
a. Maine b. Quebec, Canada c. equatorial rainforest d. The Everglades (in Florida) e. Arizona
Exposure to benzene is linked to ____
a. leukemia b. lung cancer c. bladder cancer d. skin cancer e. liver cancer
At metaphase I, homologous chromosomes are connected only at what structures?
a. Chiasmata b. Recombination nodules c. Microtubules d. Kinetochores
The condition known as "pinkeye" may be the result of infection with
A) Haemophilus influenzae. B) Trypanosoma brucei. C) Acanthamoeba. D) Clostridium botulinum. E) Chlamydia trachomatis.