Please..Biology headmasters???Helpme Please>>>>......ASAP...?

[alegna_erly]

Your instructor presents you with a red eyed Drosophilia as well as stock of purebreeding white eyed flies and another stock of purebreeding red eyed flies. why do you know that the presence of white eyed drosophilia is caused by homozygosity for a recessive allele? how would you determine whether the single red eyed fly is heterozygous for the white eyed allele??


thanks

please include your solution..


please......................