In the Nematode C

Multiple Choice

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 58 of them can't move at all,45 show a very reduced ability to move,and the remaining 17 seem to have a completely wild-type phenotype with respect to movement ability.These observations suggest that e has:

A) high environmental components.
B) incomplete expressivity.
C) incomplete penetrance and variable expressivity.
D) low expressivity and variable penetrance.
E) low penetrance.