In a cross between a white-eyed female (ww) and a red-eyed male (w+Y), nearly all the progeny were either red-eyed females (w+w) or white-eyed males (wY). However, about 1 in every 2000 F1 flies had an "exceptional phenotype," and was either a white-eyed female or red-eyed male. How did Bridges explain this unexpected result?

+1 vote



Incomplete cytokinesis


Mitotic crossing over


Incorrect synapsis




asked May 2, 2013 in Genetics by anonymous

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answered May 2, 2013 by anonymous

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