Genetics more questions?

Question

You cross a Drosophila female with forked bristles (f) and black body (b) to a true breeding wild-type male. You get only wild type female and forked male progeny. There are no black progeny. Are forked and black on the same chromosome? Are they X-linked? Explain.

Answer 1

black is not x-linked,
if it is, then male progeny, having only one X, must express the black gene on the x. But now all male are not black (assume sigificant male have been produced, so not by chance), it is not x-linked
forked is x linked recessive
some female get the fork gene from their mother
so they are heterzygous, but yet, all of them are wild type
so it is recessive
Being recessive, it can be express in male
so it is x-linked
if not x- linked, male is heterozygous,
they should not show fork as phenotype as the gene is recessive
one i x linked, the other is not
of course not on same chromosome la