Which of the following genetic disorders is caused by a dominant allele but does not produce symptoms until the affected individual is well into adulthood?
A) Huntington disease
B) Down syndrome
C) Turner syndrome
D) sickle-cell anemia
E) hemophilia
Answer: A
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Approximately ____ Y-linked genes have been discovered
a. 10 b. 20 c. 60 d. 80 e. 120
?-oxidation
A) is the second step in the oxidation of glucose. B) is a process used to oxidize fatty acids. C) occurs in the cytoplasm. D) is a process used to digest some polysaccharides. E) lengthens fatty acids by addition of two carbons.
Which of the following is an example of macroevolution?
A. the origin of horses and donkeys from a common ancestor B. giraffes with longer necks reaching higher tree branches C. antibiotic resistance in S. aureus D. female cardinals preferring males with bright red feathers E. the beaks of cactus finches changing in size in response to a drought on the Galapagos islands
Minerals move from the innermost layer of the cortex into the stele via:a
osmosis. b. simple diffusion. c. facilitated diffusion. d. aquaporins. e. active transport