With which of the following would hemizygosity most likely be associated?
A) codominance
B) X-linked inheritance
C) incomplete dominance
D) trihybrid crosses
E) sex-limited inheritance
Answer: B
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Histone deacetylase inhibitors are a class of drugs used as mood stabilizers and anti-epileptics that are also being researched for their efficacy as anti-cancer agents. Histone deacetylase inhibitors block the action of histone deacetylases, which remove acetyl groups from lysine residues in histone tails. How will blocking histone deacetylases affect gene expression in the cell?
A. Chromatin will become more tightly compact, and gene expression will be reduced. B. Chromatin will become more tightly compact, and gene expression will be increased. C. Chromatin will become more open, and gene expression will be reduced. D. Chromatin will become more open, and gene expression will be increased. E. Chromatin will become more methylated, and gene expression will be decreased.
Many plants have fungi in a close symbiotic relationship with the plant roots. These are
a. root nodules. b. mycorrhizae. c. parenchyma. d. sclerenchyma. e. stomata.
Why do some bread recipes suggest letting the dough rise in a warm place after kneading?
A. The metabolic rate of yeast slows down at warmer temperatures, so more sugar is maintained and the bread is sweeter. B. Yeast cannot carry out fermentation at room temperature. C. Warming the bread slightly before cooking it in a hot oven stretches out the gluten. D. The metabolic rate of yeast speeds up at warmer temperatures, so more carbon dioxide is released and the dough rises more quickly.
Which of the following processes is involved in the "central dogma" of genetics?
A) translation only B) transcription only C) DNA replication only D) transcription and translation E) DNA replication and translation