Geneticists designate heritability as "narrow" or "broad" to account for the fact that


A) genes contribute to different degrees. Typically, recessive alleles are rare and can have a large impact and dominant alleles tend to be common with minor but additive effects.

B) genes contribute to different degrees. Typically, dominant alleles are rare and have a small impact and recessive alleles tend to be common, each with major effects.

C) genes contribute to different degrees. Typically, dominant alleles are rare and can have a large impact and recessive alleles tend to be common with minor but additive effects.

D) dominant and recessive alleles have equal impact, but dominant alleles are more common than recessive alleles.


C) genes contribute to different degrees. Typically, dominant alleles are rare and can have a large impact and recessive alleles tend to be common with minor but additive effects.

Biology & Microbiology

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Which of the following is NOT true of spindles?

a. They are permanent cell structures. b. Centrosomes act as microtubule originating centers for spindles. c. Some of their microtubules overlap at the cell equator. d. Tubulin is the main component. e. They are bipolar in their configuration

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An ecologist who focuses on the individual could study all of the following, except

A) morphology. B) physiology. C) behavior. D) death rate.

Biology & Microbiology

Vlad, 28 years old, is a slender, jumpy man with eyes that seem to bulge out of their sockets. His heart rate is unusually fast. Which of the following conditions does Vlad most likely have?

A) Addison's disease B) acromegaly C) Cushing's syndrome D) Graves' disease

Biology & Microbiology

In humans, the oxygen concentration of the blood is the most important chemical stimulus for

regulating the rate of respiration. ____________________ Indicate whether the statement is true or false.

Biology & Microbiology