The distinction between multifactorial and polygenic traits is that
A) polygenic traits are caused by more than one gene, and multifactorial traits are caused by one or more genes as well as environmental influences.
B) multifactorial traits are not genetic, and polygenic traits are genetic.
C) the genetic component can be determined for polygenic traits but not for multifactorial traits.
D) polygenic traits are caused by more than one gene, and multifactorial traits are caused by only one gene.
A) polygenic traits are caused by more than one gene, and multifactorial traits are caused by one or more genes as well as environmental influences.
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If you were a conservation biologist in charge of the recovery plans for an endangered species, which would you prefer to find within that species—an even distribution of age classes or a pyramid-shaped age distribution? Why?
What will be an ideal response?
The infectious dose
A. is the same for all microorganisms. B. may be 10-100 cells for Salmonella. C. is expressed as ID50. D. is defined as the number of microbes necessary to ensure infection. E. is expressed as ID50 AND is defined as the number of microbes necessary to ensure infection.
In translation, mRNAs are read in the _______ direction, and polypeptide chains are synthesized from the _______ends.
a. 5? to 3?; carboxyl to the amino b. 5? to 3?; amino to the carboxyl c. 3? to 5?; carboxyl to the amino d. 3? to 5?; amino to the carboxyl
What enzyme catalyzes the attachment of amino acids to tRNA molecules?
A. aminoacyl-tRNA synthetase B. helicase C. translation factor D. topoisomerase E. ribosome