In a pedigree, a person whose symbol is filled in and who is associated with the Roman numeral II is ____
a. affected by the trait and in the second generation
b. not affected by the trait and in the second generation
c. affected by the trait and is the second-oldest child in the family
d. not affected by the trait and is the second-oldest child in the family
e. affected by the trait and has an identical twin
a
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Assortative and disassortative mating are similar in that both ____
A. are kinds of selection pressure. B. change only the expected Hardy-Weinberg genotype frequencies in a population. C. are examples of random mating. D. change only the expected Hardy-Weinberg allele frequencies in a population. E. change both the expected Hardy-Weinberg allele and genotype frequencies in a population.
Traditional and molecular phylogenies disagree on which one of the following issues?
A. whether or not the Eumetazoa are monophyletic. B. whether the Bilateria and Radiata split early into separate monophyletic clades. C. whether the split between Parazoa and Eumetazoa occurred at a very early stage in animal evolution. D. whether Echinodermata and Chordata are both deuterostomes. E. whether the appearance and type of coelom is important in interpreting phylogeny.
If a mixture of bacteriophages, some labeled with
radioactive sulfur and others labeled with radioactive phosphorus, is placed in a bacterial culture, the bacteria will eventually contain a. radioactive sulfur. b. radioactive phosphorus. c. both radioactive sulfur and phosphorus. d. neither radioactive sulfur nor radioactive phosphorus. e. complete viruses with radioactive sulfur coats.
There are normally one or two cases of measles per month in a particular city. However, in the month of September, there were 15 cases. Is this an epidemic?
A. Yes B. No