A dihybrid test cross should always result in 50% of the progeny being recessive for both traits
Indicate whether the statement is true or false.
ANS: F, 25%
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PCR is useful for amplifying a particular section of DNA
Indicate whether this statement is true or false.
With respect to the cerebrum, gray matter is
a. located in the outer region and the central region surrounding the ventricles. b. located in the inner region. c. composed of nerve fibers. d. responsible for transmission of information between neurons. e. composed of only glial cells.
Why has C. elegans proven to be a useful model for understanding apoptosis?
A) The animal does not naturally use apoptosis, but can be induced to do so in the laboratory. B) The nematode undergoes a fixed and easy-to-visualize number of apoptotic events during its normal development. C) This plant has a long-studied aging mechanism that has made understanding its death just a last stage. D) While the organism ages, its cells die progressively until the whole organism is dead.
To make restriction fragments, a DNA sample is treated with ________
A) DNA ligase B) restriction enzymes C) DNA polymerase D) lysozyme