What is the risk for a man who has Down syndrome to produce a child with Down syndrome with a woman who has a normal karyotype?

A. 100%
B. 50%
C. 25%
D. 0%


Ans: D. 0%

Biology & Microbiology

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Salamanders are members of the order:a

Apoda. b. Urodela. c. Anuran. d. Tetrapoda. e. Squamata.

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Raising young rats alone, rather than in the company of other rats, may cause:

A) unusual aggression B) changes in many brain regions C) depression D) a decrease in the size of an odor processing structure

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The use of a positive selection marker in the development of Golden Rice 2 allowed the transgenic plants to grow on ________, which is usually unusable by plants

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