A Drosophila second chromosome that carried a recessive lethal mutation, l(2)g14, was maintained in a stock with a balancer chromosome marked with a dominant mutation for curly wings. This latter mutation, denoted Cy, is also associated with a recessive lethal effect€”but this effect is different from that of l(2)g14. Thus, l(2)g14 /Cy flies survive, and they have curly wings. Flies without the Cy mutation have straight wings. A researcher crossed l(2)g14 / Cy females to males that carried second chromosomes with different deletions (all homozygous lethal) balanced over the Cy chromosome (genotype Df /Cy). Each cross was scored for the presence or absence of progeny with straight wings.

In which band is the lethal mutation l(2)g14 located?

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Non-Curty progeny Cross Location of deletion 12 3 4 5 6 7 8 9 101112 no 2 no 3 yes 4 yes no