How many of the f1 children are blind

The gene for absence of eges (a) in fruit flies is recessive to teh gene for normal eyes (A). An eyeless male is crossed witha female who is purebred for normal eyes. They produce 100 offspring that are teh F1 generation. Two children from the F1 generation are then bred to make an F2 generation of 2000. How many of the F1 children are blind?

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