Answer the following statements true (T) or false (F)
1. The main purpose of polymerase chain reaction (PCR) is to generate many copies of a region of DNA.
2. DNA microarrays (gene chips) are only capable of monitoring the expression of one gene at a time.
3. Chromosomes within somatic cells of mammals cannot be cloned because they accumulate irreversible genetic changes.
4. To study the promoter of a gene, a researcher should use a cDNA library.
1. TRUE
2. FALSE
3. FALSE
4. FALSE
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Septicemic plague usually causes death before a diagnosis can be made
Indicate whether the statement is true or false.
Cytological examination of resting and contracted muscle provides important support for our current model for how skeletal muscle contracts. This evidence includes the observation that during contraction the
A) Z lines move farther apart. B) lengths of the thick and thin filaments change significantly. C) microtubules disassemble. D) muscle fibers change color. E) H zone becomes smaller.
The photograph above of the aphid and the wasp is
an example of a. mimicry. b. display behavior. c. warning coloration. d. chemical defenses. e. biological control of pests.
Which of the following disorders is not a X-linked trait?
A. muscular dystrophy B. hemophilia C. adrenoleukodystrophy D. All of these are X-linked disorders.