The X and Y chromosomes ____
a. are responsible for autosomal recessive inheritance
b. will lead to color-blindness in all carriers
c. are found paired with all 22 autosomal chromosomes
d. are responsible for albinism
e. play major roles in determining the sex of an individual
e
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An environment would be considered harsh to an organism if:
a. it would be difficult for the individual to maintain homeostasis. b. the temperatures are extreme. c. salinity varies. d. pressure gradients are large. e. light levels are low.
In adaptive immune responses, which cell type is capable of acting as an antigen-presenting cell?
a. T cell b. monocyte c. eosinophil d. B cell e. basophil
Four of the following maintain genetic equilibrium and allele frequencies. Which one is the exception?
a. lack of gene flow b. large population interbreeding freely c. differential survival and reproduction d. random mating e. absence of mutations
Which scientist's work first suggested that DNA had the shape of a helix?
A. Martha Chase B. James Watson C. Rosalind Franklin D. Francis Crick