Transfer of genetic information via direct cell-cell contact is called ________.
A. transfection
B. transduction
C. transformation
D. conjugation
Answer: D
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The death rate from cervical cancer has decreased sharply since the mid-1960s, mainly as a result of _____.
A. Pap tests B. CT scans C. genetic mapping D. encephalograms
The phenotype of vestigial (short) wings (vg) in Drosophila melanogaster is caused by a recessive mutant gene that independently assorts with a recessive gene for hairy (h) body
Assume that a cross is made between a fly with normal wings and a hairy body and a fly with vestigial wings and normal body hair. The wild-type F1 flies were crossed among each other to produce 1024 offspring. Which phenotypes would you expect among the 1024 offspring, and how many of each phenotype would you expect?
What class of antibodies is normally found in the mucosa of the respiratory tract?
a. IgA b. IgD c. IgE d. IgG e. IgM
You see a cell with several nuclei and you know that something is different about cell division. What is the most likely explanation?
A) failure of cytokinesis following mitosis B) failure of sister chromatids to separate C) nondisjunction D) failure of homologous chromosomes to separate