A certain genetic disorder appears to be inherited from mother to child. What are two possible modes of inheritance
for this disorder?
What will be an ideal response?
ANSWER: This could be maternal inheritance with the disorder being caused by a mutation in the
mitochondrial DNA. This could also be a disorder related to epigenetics, where the paternal
copy of a gene is inactivated so the only active copy is the maternal copy which, if mutated,
would cause the disorder.
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Because more than one codon can specify the same amino acid, the genetic code is said to be
A. repetitive. B. redundant. C. reverse. D. degenerate. E. degrading.
What feature do the tree, ring, and web of life phylogenetic models share?
a. horizontal gene transfer between prokaryotes b. all species share a single common ancestor c. new species evolve from existing species d. speciation from the exchange of transposons
Monosaccharides may be characterized by all
EXCEPT which of the following? a. a ketone group b. carbon, hydrogen, and oxygen in a 1:2:1 ratio c. a backbone of five to six carbon atoms d. one carbonyl group e. the presence of glycerol and fatty acids
Which of the following does not take place in the nucleus?
a. DNA replication b. Translation c. RNA processing d. Transcription