Fertilization occurs in the ____
a. ovary
b. uterus
c. vagina
d. oviduct
e. follicle
d
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Analysis of DNA fragments in gel electrophoresis is based on
A. DNA having an overall negative charge and moving to the positive pole. B. DNA fragments being stained so that they can be seen. C. application of an electric current through the gel causing DNA fragments to migrate. D. larger fragments moving slowly and remaining closer to the wells. E. All of the choices are correct.
In flowering plants, how many sperm cells are typically produced from each microspore mother cell?
a. one b. two c. three d. four e. eight
When an object with blood on it touches one that does not have blood on it, this produces a(n)
A) contact pattern. B) flow. C) trail pattern. D) void.
The Pax6 gene, responsible for initiating lens formation in mice, can be inserted into fruit flies and
A. causes cancer of the brain as it tries to initiate a mammalian eye. B. forms a partial eye since it is somewhat similar to the Pax7 gene of fruit flies. C. will have no effect, indicating the extreme differences in lens formation. D. can be expressed to initiate formation of an eye on the fruit fly's leg. E. it is lethal to them.