The mutation that resulted in the lighter skin
color of people of European descent occurred
between ____ and ____ years ago.
a. 100...600
b. 1000...6000
c. 6000...10,000
d. 100, 000...600,000
e. 600,00... 1,000,000
C
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The Southern blotting technique for transferring DNA from an agarose gel to a piece of nitrocellulose membrane is named for E. M. Southern, the person who developed the procedure.
Answer the following statement true (T) or false (F)
Which enzyme recognizes a specific nucleotide sequence (~4 to 8 nucleotides in length) and catalyzes the digestion of the nucleic acid at that site, causing a break in the DNA strand?
a. Ligase b. Gyrase c. Helicase d. Endonuclease
Mutations can create new alleles that
A. are beneficial to the organism's fitness. B. have no effect on the fitness of the organism. C. decrease the fitness of the organism. D. All of the choices are correct.
An organ must contain at least:
A. two different tissue types. B. connective tissue. C. all four of the tissue types. D. two different muscle types. E. two different cell types.