The tortoiseshell pattern on a cat
A) usually occurs in males.
B) is the result of a homozygous recessive condition.
C) results from X chromosome inactivation.
D) is a result of alleles on the Y chromosome.
Answer: C
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During translation, the nucleotides that make up the mRNA are read in groups of three. These groups are called
A. codons. B. anticodons. C. exons. D. introns. E. templates.
Which type of physical mapping would be best to use when variable recombination frequency is a concern?
a. restriction fragment length polymorphism b. cytogenetic mapping c. radiation hybrid mapping d. microsatellite polymorphism
The hierarchical nature of cellular structure is accurately illustrated in which of the following lists of substances (from smallest to largest)?
A) nucleotides, chromosome, DNA, nucleus, cell B) cellulose, glucose, cell wall, cell C) nucleotides, nucleus, DNA, chromosome, cell D) nucleotides, DNA, chromosome, nucleus, cell E) protein, membrane, amino acids, chloroplast, cell
The total number of different three-base combinations of the four nucleic acid bases is:
a. 12. b. 16. c. 20. d. 64. e. 256.