A growing concern for treating bacterial diseases or pest outbreaks is the evolution of antibiotic or pesticide resistance by bacterial or pest populations. Resistance means that a particular antibiotic is no longer effective in treating a disease, or that a particular pesticide will no longer prevent crop damage. This resistance […]

A new kind of tulip is produced that develops only purple and pink flowers. Assume that flower color is controlled by a single-gene locus and that the purple allele (C) is dominant to the pink allele (c). A random sample of 1000 tulips froma larg cultivated field yields 812 purple […]

Question: In a 1973-74 situation comedy “All in the Family”, the character Archie Bunker says: “Let me tell you something about beer: You can never buy beer, you can only rent it.” By that he meant that when you drink beer, you have to urinate a lot, and very soon. With […]

1. How many phenotypic classes may be generated from athree-point testcross?A. (3)=27B. (2)=4C. (2)3=8D. (3)2=9E. It cannot be predicted. 2.__________ bacterial strainsrequire nutritional supplements in order to grow in a minimalmedium.A. HeterotropicB. PrototrophicC. PhototropicD. AutotrophicE. Auxotrophic 3. An arg-strain of E. coli istransformed with a plasmid carrying the wild-type (arg+) […]