As the result of exposure to a mutagen, cytosine is substituted for thymine in one strand of DNA. Upon subsequent DNA replication, one of the daughter cells will have a GC pair in this position instead of an AT pair. This is called a(n) ________ mutation.
A. transversion
B. frameshift
C. insertion
D. transition
Answer: D
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The most accurate description of an organism with genotype AaBb is
a. homozygous dominant. b. heterozygous. c. heterozygous dominant. d. homozygous recessive. e. heterozygous recessive.
Which of the following is(are) NOT a factor(s)
that explain(s) the area effect on island diversity? a. Larger islands have more habitats. b. Smaller islands have more varied and higher elevations. c. Larger islands intercept more colonizers. d. Smaller islands have less complex topography. e. None of these are factors.
Which statement about clinical identification tests is true?
A. Microarray tests are based on electrophoresis methodology. B. Not all diseases are identified by clinical tests. C. Biochemical tests are quicker than genetic analysis tests. D. Serological tests are always based on identifying antibodies in the patient.
An effector is _____
something that causes an effect a muscle or gland what a motor neuron stimulates all of the above