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nonpenetrance

[ nŏn-pĕnĭ-trəns ]
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n.

The state in which a genetic trait although present in the appropriate genotype fails to manifest itself in the phenotype.
The obscuring of genetic traits by nongenetic mechanisms.

QUIZZES

THINK YOU’VE GOT A HANDLE ON THIS US STATE NICKNAME QUIZ?

Did you ever collect all those state quarters? Put them to good use on this quiz about curious state monikers and the facts around them.
Question 1 of 8
Mississippi’s nickname comes from the magnificent trees that grow there. What is it?
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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