The chromosomal designation for a human female is

A. XYY.
B. XY.
C. YY.
D. XX.
E. None of the answers are correct.


D. XX.

Biology & Microbiology

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During prophase II,

a. a new bipolar spindle forms. b. crossing over occurs. c. chromosomes are single-stranded. d. the cell is diploid. e. the nuclear envelope re-forms.

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Making mRNA from DNA is known as ____

a. translation b. transcription c. polymerase d. replication e. promoter

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In bacteria, the small, circular pieces of DNA that are located outside the chromosome are called

A) sex pili. B) plasmids. C) bacteriophages. D) flagella. E) endospores.

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When our oil supply is depleted, a new material will need to be used to produce __________

A- glass B- paper C- plastic D- aluminum E- cardboard

Biology & Microbiology