Why was it important that the pea plants Mendel chose were true-breeding?
a. These plants were resistant to mutations that would have confounded his calculations.
b. True-breeding plants meant that infertile samples did not affect trait inheritance probabilities.
c. Because the plants were naturally self-fertilizing, traits from other plants could be excluded.
d. Scientific journals at that time would only accept results from specific, verified species
c. Because the plants were naturally self-fertilizing, traits from other plants could be excluded.
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What causes the large majority of errors in DNA replication?
1.chemical carcinogens 2.the speed of the replication process 3.the complexity of the replication machinery 4.mutations in proofreading and repair genes
Histamine
a. causes blood vessels to contract. b. causes capillaries to lose their permeability. c. causes an outward flow of fluids from the capillaries. d. reduces tissue swelling. e. enhances the function of cytokines.
All the DNA in a haploid set of a species' chromosomes is called a
a. DNA clone. b. plasmid. c. primer. d. genome. e. restriction site.
A scale used to indicate the strength of an acid or base is called a ____ scale.
A. thermodynamic B. aquatic C. pH D. reduction