In the nematode C. elegans, homozygosity for the e mutant allele causes an extreme "uncoordinated" phenotype, where the worm completely loses its ability to move. Examination of 100 individuals with genotype e/e reveals that 60 mutant worm can't move at all, 35 show a very reduced ability to move, and the remaining 5 seem to have a completely wild-type phenotype with respect to movement ability. These observations suggest that e has O incomplete penetrance and variable expressivity low expressivity and variable penetrance high expressivity and variable penetrance O high penetrance and incomplete expressivity
In the nematode C. elegans, homozygosity for the e mutant allele causes an extreme "uncoordinated" phenotype, where the worm completely loses its ability to move. Examination of 100 individuals with genotype e/e reveals that 60 mutant worm can't move at all, 35 show a very reduced ability to move, and the remaining 5 seem to have a completely wild-type phenotype with respect to movement ability. These observations suggest that e has O incomplete penetrance and variable expressivity low expressivity and variable penetrance high expressivity and variable penetrance O high penetrance and incomplete expressivity
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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Transcribed Image Text:In the nematode C. elegans, homozygosity for the e mutant allele causes an
extreme "uncoordinated" phenotype, where the worm completely loses its ability to
move. Examination of 100 individuals with genotype e/e reveals that 60 mutant
worm can't move at all, 35 show a very reduced ability to move, and the remaining 5
seem to have a completely wild-type phenotype with respect to movement ability.
These observations suggest that e has
O incomplete penetrance and variable expressivity
O low expressivity and variable penetrance
Ohigh expressivity and variable penetrance
O high penetrance and incomplete expressivity
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