What explains why even close relatives have a varied mix of genetic traits?
a. heterozygous
b. allele variation
c. co-dominance
d. independent assortment
e. continuous variation
ANSWER: d
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Two oxygen atoms joined to each other by the sharing of two pairs of electrons form a(n):
A. double covalent bond. B. single bond. C. hydrogen bond. D. ionic bond.
With the E. coli trp operon where both repression and attenuation occur, the extent of regulation achieved by repression is ________ the extent of regulation achieved by attenuation.
A. greater than B. less than C. the same as D. Repression is not used in the regulation of the E. coli trp operon.
The terms phototroph and chemotroph refer to an organism's source of
A. carbon. B. nitrogen. C. energy. D. electrons.
DNA encoding a normal gene is inserted into cells from a patient with a defective form of the gene. Recombinant cells are identified and isolated, and returned to the patient's body. This is an example of
A) gene therapy. B) genomics. C) genetic mapping. D) genotyping. E) biotechnology.