Can a woman with an X-linked recessive disorder have normal sons?

A. No
B. Yes


Answer: A

Biology & Microbiology

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The accompanying figure is a micrograph of what kind of tissue?

a. cardiac muscle b. skeletal muscle c. nerve tissue d. cartilage e. dense connective

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The cell walls of plant cells that have stopped

growing and actively dividing are characterized by the presence of a. pectin. b. cellulose. c. glue-like polysaccharides. d. lignin. e. a gluey matrix containing rope-like strands

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The time from when pathogen first enters the body and begins to multiply, until symptoms first appear is the ________.

A. period of invasion B. convalescent stage C. prodromal stage D. incubation period

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Vitamin B9 regulates synthesis of (A)_________ , and its deficiency leads to defects in (B)_____________.

a. (A) dTTP, (B) DNA synthesis b. (A) dCTP, (B) mitosis

Biology & Microbiology