DNA fingerprinting makes use of variations in ________ within the population
a. the hemoglobin gene
b. homeodomains
c. short tandem repeats
d. the entire genome
c
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Some chrysophytes (or "golden algae") are actually chemoorganotrophs rather than phototrophs
Indicate whether the statement is true or false.
A plaque is
A) a colony of bacteria growing on a plate. B) a clump of bacterial cells that contain phage within them. C) a region on a plate where bacteria that have survived phage infection are living. D) an area on a plate that has live phage-resistant bacteria. E) an area on a plate that has phage and dead bacteria.
There is a mutation in the operator of the trp operon in a cell such that the trp repressor is unable to bind to the operator. If tryptophan is added to the cell, what will happen?
A) Tryptophan will bind to the repressor, and trp enzymes will be produced. B) Tryptophan will bind to the repressor, and trp enzymes will not be produced. C) Tryptophan will not bind to the repressor, and trp enzymes will be produced. D) Tryptophan will bind to the operator, and trp enzymes will be produced.
A modification of a gene or chromosome that occurs during gamete formation or early development that permanently alters the expression of that gene for the lifetime of the individual is called
A. maternal effect. B. epigenetic inheritance. C. sex-linked inheritance. D. extranuclear inheritance. E. epistasis.