Ruth Lehmann
... that cell biologist Ruth Lehmann studied maternal effect genes in fruit flies?
... that <a href="./Cell_biology" id="mwA9c" rel="mw:WikiLink" title="Cell biology">cell biologist</a> <b id="mwA9g"><a href="./Ruth_Lehmann" id="mwA9k" rel="mw:WikiLink" title="Ruth Lehmann">Ruth Lehmann</a></b> studied <a class="mw-redirect" href="./Nanos_(gene)" id="mwA9o" rel="mw:WikiLink" title="Nanos (gene)">maternal effect genes</a> in <a href="./Drosophila_melanogaster" id="mwA9s" rel="mw:WikiLink" title="Drosophila melanogaster">fruit flies</a>?