Discuss how two of the following alter allele frequencies in populations: nonrandom mating, genetic
drift, gene flow, and natural selection. What will be an ideal response?
Gene flow can alter allelle frequencies in populations by introducing new genotypes to a population
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Laboratory strains of E. coli ____
a. undergo meiosis b. divide every 2 hours c. can be transformed but not conjugated d. have been engineered to produce human insulin e. are harmful to humans
Subatomic particles that have a negative charge and orbit around the nucleus _______________
Fill in the blank(s) with the appropriate word(s)
Molecular analysis of lactase DNA __________ in humans shows that genes for that enzyme have __________ evolved in Africa and Europe to produce the same result.
Fill in the blank(s) with the appropriate word(s).
How do we know that viral and bacterial chromosomes most often consist of circular DNA molecules devoid of protein?
A. Higher level circular chromosomal structures have been revealed through electrophoresis and density analysis. B. Higher level circular chromosomal structures have been revealed through both mathematical calculations and electron microscopy C. Higher-level circular chromosomal structures have been revealed through both chemical and observational (microscopic) analyses D. Higher-level circular chromosomal structures have been revealed through both chemical and radiolabeling analyses.