On a branching diagram, where should existing species be placed?
a. On twigs
b. On larger branches
c. At the base of the tree
d. At the nodes
Answer: a. On twigs
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Which of the following is true of incomplete penetrance?
A. Environmental factors do not influence penetrance. B. Incomplete penetrance implies that some individuals will experience less severe forms of disease such as cancer or Alzheimer's. C. Gene interactions have been shown to result in incomplete penetrance in some cases. D. Incomplete penetrance refers to cases in which individuals developing a particular disease (e.g., cancer or Alzheimer's) lack the typical genotype for this disease.
Mutagenic chemicals that ____ and are incorporated into DNA or RNA during synthesis are called base analogs
a. resemble nucleotides b. resemble genes c. resemble amino acids d. cause deletion mutations e. cause frameshift mutations
If a DNA sequence of a gene reads, in part, TAACAGGTCA, what is the sequence of the complementary strand of DNA?
A) ATTGTCCAGT B) AUUGUCCAGU C) UUACAGGUCC D) CTTGTGGACC
The chromophore of basic dyes is a ________ and is ________ to MOST types of bacteria.
a) cation; attracted b) anion; attracted c) cation; not attracted d) anion; not attracted