Which choice best describes the main idea behind using the lod method to determine if genes are linked?
1.Linked genes that are farther apart are more likely to be separated by crossing over, so genetic map units are derived from recombination frequencies.
2.The lod score is the log10 of the ratio of the two probabilities that results are either consistent with linkage or that they are not.
3.Software is used to calculate the probability, or lod score, that the observed frequency of recombination is consistent with linkage.
4.One lod map unit is equal to a 10% frequency of recombination.
2
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Mitotic cell division in unicellular eukaryotes can result in a cell that is:
A. 1n. B. 2n. C. Either 1n or 2n, depending on whether the organism predominantly exists as a haploid cell or a diploid cell.
An opportunistic pathogen_____
a. can cause disease when it is transferred to another site in the body b. only causes disease in immunocompromised individuals c. is a part of the resident biota d. is another term for true pathogen e. usually chooses not to cause disease
Which phrase describes the events that occur in the production of a pollen grain from a microspore mother cell?
a. Only meiosis occurs. b. First mitosis occurs, and then meiosis, followed by mitosis. c. First meiosis occurs, and then mitosis. d. First mitosis occurs, and then meiosis.
A transplant patient has been prescribed corticosteroids as part of his post-transplant medication regimen. What class of drug is the patient taking?
A. Hormone B. Immunosuppressive C. Anti-metabolite D. Calcineurin inhibitor