The zygote produced during double fertilization is ____
a. diploid
b. tetraploid
c. polyploid
d. triploid
e. haploid
ANSWER: a
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Examine the pedigree in the figure above, where individuals that have the genetic condition being
tested are marked with filled squares or circles. Which of the following inheritance patterns is most likely correct for this condition?
a. autosomal dominant b. X-linked recessive c. X-linked dominant d. cytoplasmic inheritance e. autosomal recessive
A ____ secretes a chemical message for the purpose of cellular communication
a. muscle b. neuron c. keratinocyte d. fibroblast e. platelet
During muscle contractions,
a. the sarcomeres shorten. b. the actin filaments slide over the myosin filaments. c. the actin filaments move toward the middle of the sarcomere during contraction and away on relaxation. d. the muscle fibers thicken. e. all of these occur.
The ________ is the electron donor in a redox reaction.
A. product B. enzyme C. reductant D. oxidant