Given the following gel, which DNA fragment has a lower electrophoretic mobility?
What will be an ideal response?
Band 1
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When the immune systems no longer distinguishes between self and nonself, _____ can result
a. autoimmunity b. anaphylaxis c. viral infections d. minor allergic reactions e. enhanced immune response
If both parents are affected, due to the presence of one copy of the dominant allele responsible for the trait being studied, what are the odds that they would have a normal child?
a. 0 b. 25% c. 50% d. 75% e. 100%
This apparatus was used in the primitive Earth
atmosphere simulation experiments performed by a. Stanley Miller. b. Thomas Brock. c. Australian researchers. d. Jeon Kwang. e. Lynn Margulis.
In Drosophila, the allele red eyes (bw+) is dominant to the allele for brown eyes (bw). At another gene locus on the same chromosome, the allele for thin wing veins (hv+) is dominant to the allele for heavy wing veins (hv). Flies homozygous for bw and hv+ are crossed to flies homozygous for bw+ and hv to obtain doubly heterozygous F1 progeny.Given that these two gene loci are very closely linked, the phenotypic ratio in the F2 generation should be closest to
A. 3 red eye, thin wing veins: 1 brown eye, heavy wing veins B. 1 brown eye: 1 red eye: 1 heavy wing veins: 1 thin wing veins C. 1 brown eye, heavy wing veins: 2 red eye, thin wing veins: 1 brown eye, thin wing veins D. 1 brown eye, thin wing veins: 2 red eye, thin wing veins: 1 red eye, heavy wing veins