In a pedigree chart, a male who demonstrates the trait being studied is represented by a ____
a. darkened square
b. darkened diamond
c. clear circle
d. clear square
e. darkened circle
ANSWER: a
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If an organism has a single copy of each chromosome, then it is
A. aneuploidy. B. diploid. C. haploid. D. tetraploid. E. polyploidy.
Bacterial endospores are produced by ________.
A. Mycoplasma B. Staphylococcus C. Entamoeba D. Bacillus
Which of the following is NOT an example of sensory adaptation?
a. a loss of the sense of pressure of clothes against the skin b. adjustment to repeated jumping into a body of cold water c. response to lack of oxygen at high altitudes d. eventual loss of awareness of a constant noise e. the loss of the ability to smell a person's perfume or cologne after being in that person's presence for some time
When a mutation occurs during DNA replication, ____ replaces the incorrect nucleotide with the correct one after the
mismatched nucleotide has been removed. a. mismatch repair enzymes b. DNA ligase c. DNA polymerase d. telomerase e. helicase