What is the height of a person with the genotype (AA, Bb, cc, DD)?
Height (tallness) in humans is a polygenic trait. Assume the following:
There are 4 genes that determine height (Aa, Bb, Cc, Dd).
Each dominant allele adds 2 inches of height to an individual.
The height of the recessive individual (aa, bb, cc, dd) is 5 feet.
A. 5?4?
B. 5?10?
C. 5?8?
D. 6?6?
E. 5?6?
B. 5?10?
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During DNA cloning, why is the DNA of interest inserted into the middle of the lacZ+ coding sequence in the plasmid
vector?
a. It makes the bacteria resistant to the antibiotic. b. It allows researchers to distinguish bacteria that contain the plasmid from those that do not. c. It aids scientists in developing new antibiotic treatments. d. It allows researchers to distinguish bacteria that contain the recombinant plasmid from those that contain just the vector. e. It makes the bacteria produce more clones.
The purpose of irradiating foods is to
a. increase the vitamin content. b. increase the mineral content. c. destroy harmful bacteria, fungi and other microorganisms. d. limit spoilage. e. both destroy harmful bacteria, fungi, and other microorganisms and limit spoilage.
Cells are constantly manipulating their DNA and histone proteins to regulate
A. gene expression. B. mutation formation. C. crossing-over. D. segregation.
Which immunoglobulin is the major form of antibody in blood plasma?
A. IgD B. IgE C. IgM D. IgG E. IgA