How can you distinguish between a maternal effect gene and a zygotic gene in a cross between these two flies?

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female: m/m  X male: m/+

A zygotic gene would give a 1:1 ratio of mutant to normal offspring, whereas a maternal effect gene would be lethal and generate no viable offspring.

A zygotic gene would give a 1:1 ratio of mutant to normal offspring, whereas a maternal effect gene would be all mutant.

A maternal effect gene would give a 1:1 ratio of mutant to normal offspring, whereas a zygotic gene would be all mutant.

Both a zygotic gene and a maternal effect gene would give a 1:1 ratio of mutant to normal offspring, but the mutant offspring would be all female in the maternal effect gene.

 

asked Jun 21, 2013 in Genetics by GeneX ~Top Expert~ (7,947 points)
    

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A zygotic gene would give a 1:1 ratio of mutant to normal offspring, whereas a maternal effect gene would be all mutant.

answered Jun 21, 2013 by GeneX ~Top Expert~ (7,947 points)

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