Which one of the following will prevent significant genetic drift?
A) Gene flow is absent.
B) There is genetic variation.
C) There is mutation.
D) The population size is large.
D
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In the collecting ducts of the kidney, antidiuretic hormone promotes water conservation by increasing the levels of
A. aquaporins. B. G-protein coupled receptors. C. vasopressin. D. Na+/K+ ATPase. E. Na+/glucose symporters.
A fairly conserved gene is compared between a human, a chimpanzee, a bear and a banana. How would you expect
their DNA sequences to relate? What will be an ideal response?
Prader-Willi and Angelman syndromes are caused by which type of chromosomal mutations, both in connection with chromosome 15?
A) monosomy B) trisomy C) mosaicism D) uniparental disomy E) random X-inactivation
Which of the following is NOT true of horizontal gene transfer?
A. It increases genetic diversity for a species. B. It occurs when genes are transferred from parent to progeny. C. It has important implications for inferring phylogeny. D. It can occur through endosymbiosis. E. It occurs commonly in bacteria.