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Home Q & A Board Biology-Related Homework Help Genetics and Developmental Biology
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aerodude30 aerodude30
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10 years ago
Ive got a pretty long question here so here we go Slight Smile
"In fruit flies the allele for normal wings (N) is dominant over the dumpy (n) allele. Two normal winged fruit flies mater producing 320 offspring of both wing types.
1.) what are the genotypes of the P generation?
2.) how many of the 320 offspring will ave normal wings and how many will have dumpy wings
3.) How many of the 320 offspring will be heterozygous?
4.) If you wanted to test whether a particular normal winged fly was homozygous or heterozygous what cross would you perform?
5.) What would the results have to be to indicate the normal winged fly in question was indeed heterozygous?

I know this seems like a lot but any help whatsoever would be much appreciated, i find genetics very challenging.
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10 years ago
I'm guessing the parents are both heterozygous, since both wing types were found in the offspring, for example Nn x Nn.

That would give you a 1 to 2 to 1 ration (NN 2(Nn) and nn)
Mastering in Nutritional Biology
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Doctor-2-BDoctor-2-B
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10 years ago
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Pretty fly for a SciGuy

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aerodude30 Author
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#3
10 years ago
Thank you very very much im so appreciative of your help and consideration!!
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