100 



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Q 



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a 

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(T 

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If) 

 O 

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100 



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10 



20 40 60 80 20 40 60 80 



DAYS OF LIFE (FEMALE) 



Fig. 29.2 — Lifetime daily egg production of different races of Drosophila melanogasler, 



number of initial females tested, 53 to 56. 



