Heritability refers to
A) the genetic contribution to a phenotype in a population at a particular time.
B) the genetic contribution to the variability of a phenotype in a population at a particular time.
C) the number of genes contributing to a trait in a population.
D) the degree to which offspring resemble parents.
B) the genetic contribution to the variability of a phenotype in a population at a particular time.
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Meiosis typically results in the production of
a. two diploid cells. b. four diploid cells. c. four haploid cells. d. two haploid cells. e. one triploid cell.
How do endocrine hormones affect their target cells?
A) They cause changes in cell metabolism only. B) They increase the permeability of the target cell. C) They stimulate the synthesis of glycogen. D) They cause changes in cell metabolism and/or gene transcription. E) They affect gene transcription only.
What are the two major components of the tobacco mosaic virus?
A) RNA and DNA B) DNA and protein C) lipids and nucleic acids D) carbohydrates and nucleic acids E) RNA and protein
Restriction endonucleases recognize and clip at DNA base sequences called ________.
Fill in the blank(s) with the appropriate word(s).