Which of the following sub-disciplines of
biology focuses on understanding the entire
genetic composition of organisms?
a. evolutionary biology
b. molecular biology
c. genomics
d. comparative anatomy
e. embryology
C
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The microorganism Cryptosporidium parvum is a
A) fungus. B) bacterium. C) protozoan. D) virus.
Evolutionary change
A. occurs through the modification of characteristics in a preexisting population. B. may involve vertical descent with mutation. C. may involve horizontal gene transfer. D. All of these choices are correct. E. None of these choices are correct.
14 homologous genes encoding globins (hemoglobin, myoglobin) in the human genome were originally derived from a single ancestor that duplicated 500-600 million years ago. Which term most adequately describes the relationship between these genes?
A. sister chromatids B. gene family C. gene cluster D. moderately repetitive sequences E. highly repetitive sequences
Which of the following conditions is characterized by a karyotype with 45 chromosomes?
a. Turner syndrome b. Down syndrome c. testicular feminization syndrome d. Klinefelter syndrome e. cri-du-chat