define cross between red eyed flies and white eyed flies?

Answer 1

In Drosophila (the fruit fly), the mutation for white eye color is on the X chromosome (so, it is said to be sex-linked). When red- eyed males are mated (crossed) with white eyed females, all the female offspring have red eyes (but are heterozygous), while all the males have white eyes (because the Y chromosome does not have the gene for eye color, so the White eye gene on the X chromosome that the males got from their mothers is expressed).
However, if a white eyed male is crossed with a red eyed female, all the offspring have red eyes (although the females are heterozygous).

Answer 2

In those exact alleles, the purple eye function might have an allele of RR, or Rr (because of the fact that is dominant) A capital R represents the purple eyes gene on an identical time as the little r represents a white eyed gene. because of the fact white eyes are recessive, a fly with white eyed features might desire to have the allele rr. right this is the way you utilize a punnett sq.. this occasion exhibits 2 white eyed flies generating offspring. The sq. under exhibits the white eyed gene crossing over. determine Gene (allele rr) r r determine Gene (allele rr) r rr rr (forget approximately approximately this writing) r rr rr the only letters above instruct the genetic alleles of the determine alleles. The double letters instruct all the conceivable consequences (4 consequences) that should happen. this provides a one hundred% hazard of the allele rr, for that reason the only conceivable consequence is a white eyed fly. that is puzzling to work out the punnett sq. above (formatting screws it up. lookup 'punnett sq.' there will be many pictures that supply examples).

Answer 3

What do you mean 'define'? It is allowing a red eyed fly and white eyed fly to mate to produce eggs from which offspring arise with various eye colours.

Answer 4

pink eyed flies?
:)