Suppose you perform a screen for maternal-effect mutations in Drosophila affecting external structures of the embryo and your screen identifies more than 100 mutations that affect external structures. From their screening, other researchers concluded that there are about 40 maternal-effect genes. How do you reconcile your results with those of the other researchers?
¦ HINT: This problem involves an understanding of how mutant screens work. Once mutants are identified, they must be screened by complementation analysis (Chapter 4). The key to its solution lies in remembering the differences between genes and alleles.
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