In Drosophila melanogaster, the recessive allele for the sepia locus (se) causes flies to have very dark colored eyes. The reces
sive allele at the apterous (ap) locus causes the fly to lack wings. A male from a true breeding line of sepia eyed, apterous flies (line A) is crossed to a female from a true breeding line of red eyed, winged flies (the "wild type" line B) to create an Fl:
Next, a female from the Fl is crossed to a male from line A.
The phenotypes of 1000 progeny from this test cross were scored as follows:
The other two Domains being "Bacteria" and "Eukarya" (which includes us humans). Archaebacteria<span> are characterized by having different cell call components, coenzymes and RNA Sequences compared to bacteria. ... </span>Eubacteria<span> have a rigid cell wall. However, they can be both gram positive and gram-negative.</span>