To understand the genetic basis of locomotion in the diploid nematode Caenorhabditis elegans, recessive mutations were obtained, all making the worm “wiggle” ineffectually instead of moving with its usual smooth gliding
motion. These mutations presumably affect the nervous
or muscle systems. Twelve homozygous mutants were
intercrossed, and the F1 hybrids were examined to see if
they wiggled. The results were as follows, where a plus
sign means that the F1 hybrid was wild type (gliding) and
“w” means that the hybrid wiggled.a. Explain what this experiment was designed to test.
b. Use this reasoning to assign genotypes to all 12
mutants.
c. Explain why the
mutants 1 and 2 differed from that of the hybrids between
mutants 1 and 5
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