What is a syndrome?
A) a characteristic facial appearance
B) a trait that leads to cancer at some stage in life
C) a group of traits typically found in conjunction with a particular chromosomal aberration or gene mutation
D) a specific characteristic that appears in conjunction with one specific aneuploidy
C
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Frogs "croak" at night to allure females for mating. Females are attracted only to the song of their species. This is an example of
A. mechanical isolation. B. temporal isolation. C. habitat isolation. D. behavioral isolation. E. gametic isolation.
Bacteria use ______ attached TO the polymerase to direct RNA polymerase to promoters; eukaryotic cells use ______ that attach directly to the DNA first instead
A. sigma factors; transcription factors B. transcription factors; sigma factors C. ribosomes; sigma factors D. tRNA; rRNA
The gene pool refers to all of the genetic information within a
A) cell. B) individual. C) population. D) species.
A nosocomial infection is
A) always present, but is inapparent at the time of hospitalization. B) acquired during the course of hospitalization. C) always caused by medical personnel. D) only a result of surgery. E) always caused by pathogenic bacteria.