If the researchers are correct, the X chromosomes likely cross over at the locus that controls normal or barred eyes.

a. true
b. false


Answer: a. true

Biology & Microbiology

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________ are glycoprotein spikes protruding from the outer surface of the viral envelope.

Fill in the blank(s) with the appropriate word(s).

Biology & Microbiology

In standardized DNA fingerprinting used in the United States,

a. 13 different noncoding loci are examined. b. 13 different coding loci are examined. c. only loci with short tandem repeats are tested; the number varies with individuals. d. the loci with long tandem repeats are tested; the number varies with individuals. e. the sequence of short tandem repeats is determined.

Biology & Microbiology

Which region of the lac operon would you target if you want to disrupt the -10 and -35 consensus sequences?

A) lacZ B) lacY C) lacI D) lacP E) lacO

Biology & Microbiology

The spikes of a paramyxovirus bind and fuse adjacent host cell membranes to produce a ________.

Fill in the blank(s) with the appropriate word(s).

Biology & Microbiology