Mendel’s laws of inheritance

Drosophila melanogaster (fruit flies) are excellent animals to use for studying Mendel’s laws of inheritance. Two Mendelian traits that are often used for these experiments are eye colour (encoded for by the ‘W’ gene) and wing shape (encoded for by the ‘Vg’ gene).

The ‘W’ allele is dominant, and gives red eyes, while the ‘w’ allele is recessive and gives white eyes. The ‘Vg’ allele is dominant, and gives normal wings, while the ‘vg’ allele is recessive and gives vestigial wings (which are almost absent and have only a small amount of wing tissue). For interest, http://www.genetics-gsa.org/pdf/GSA_USASEF_Drosophila_Mutants_2014.pdf shows these, as well as other common Drosophila phenotypes.

Starting with a cross between a true-breeding red-eyed, vestigial-winged fly (WW vgvg) and a true-breeding white-eyed, normal-winged fly (WW VgV List the genotypes of the F1 flies.