What is NOT true of neutral mutations?
a. they have no effect on an individual
b. they accumulate at a constant rate
c. they happen at random
d. they are relatively rare
e. more than one of these is NOT true
D
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Sexual reproduction has an advantage over asexual reproduction by ____
a. requiring an interaction between two individuals b. creating more genetic diversity c. ensuring a greater number of progeny d. keeping the number of chromosomes constant more effectively e. allowing for the production and use of gametes
Under high tryptophan conditions, tryptophan binds to and activates the repressor protein, thereby blocking
transcription of the trp operon. This is an example of: a. protein degradation. b. negative control of inducible genes. c. negative control of repressible genes d. positive control of inducible genes. e. positive control of repressible genes.
A mutation in a gene often results in a reduction of the product of that gene. The term for this type of mutation is ________
A) gain of function B) loss of function or null (in the case of complete loss) C) codominance D) multiple allelism E) incomplete dominance
Mitogens are _____
(a) extracellular signals that stimulate cell division. (b) transcription factors important for cyclin production. (c) kinases that cause cells to grow in size. (d) produced by mitotic cells to keep nearby neighboring cells from dividing.