Which of the following components is NOT
essential for DNA cloning?
a. plasmids
b. ligases
c. helicases
d. DNA fragments
e. restriction enzymes
C
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In mice the allele for colored fur (C) is dominant to the allele for albinism (c). The allele for normal
behavior (W) is dominant to that for waltzing movement (w). Give the probable genotypes of the parents if they produced the offspring listed after the following crosses: (a) colored normal ? white waltzer produced 10 colored normal, 8 colored waltzers, 2 white waltzers, 11 white normal (b) colored normal ? white normal produced 35 colored normal, 13 colored waltzers (c) colored normal ? colored normal produced 37 colored normal, 14 colored waltzers, 9 white normal, and 5 white waltzers What will be an ideal response?
How is hybrid sterility overcome in allopolyploid plants?
What will be an ideal response?
The four basic animal tissues are:a
connective, digestive, nervous, and respiratory. b. blood, bone, connective, and epithelial. c. epithelial, connective, muscle, and nervous. d. digestive, nervous, reproductive, and respiratory. e. circulatory, excretory, respiratory, and sensory.
The replacement electrons for the reaction center of photosystem II come from
A) glucose. B) photosystem I. C) H2O. D) O2. E) NADPH.