In a three-point mapping experiment, how many different genotypic classes are expected?

A) 0 B) 4 C) 2 D) 8 E) 1


Answer: D

Biology & Microbiology

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Larval salamanders eat small insects and crustaceans. These insects and crustaceans are

herbivores. Thus, the salamanders belong to the __________ trophic level.

a. first b. second c. third d. fourth

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Dalton's Law states that:a

the amount of a gas that diffuses across a membrane depends on the differences in the gas' partial pressure. b. the ability of hemoglobin to bind oxygen depends on the partial pressure of oxygen. c. in a mixture of gases, the total pressure of the mixture is the sum of the pressures of the individual gases. d. pH causes a displacement of the oxygen-hemoglobin dissociation curve. e. as the concentration of chloride ions increases, the ability of hemoglobin to bind carbon dioxide decreases.

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Variations of homologous genes that result in differences in structure and function are

A) alleles. B) loci. C) autosomes. D) dominant. E) linked.

Biology & Microbiology

Which mechanism causes postzygotic reproductive isolation?

A. habitat isolation B. mechanical isolation C. hybrid sterility D. temporal isolation

Biology & Microbiology