Genetics - Drosophila

[Darwin420]

Hey guys, I hate coming on this site and asking for help, but I have no other resort... I really don't know what to do ( I haven't been keeping up with genetics.)

Ok so I am given a sample of F2 generation of fruit flies bred by two true breeding flies.
Here are the pop numbers

Wild type, males -87
wild type, females - 171
Orange eyes, males 27
Orange eye females 51
black body, males 96
Orange eyes, black body, males 18

I can't really come up with a hypothesis on how these traits are linked.

As we look at wild type males vs wild type female we see that there is roughly a 50% difference in frequency. So right there means these traits aren't fully independent and something is most likely sex linked.

If we look we will see that only males have a black body which can represent two things: the trait is Y linked OR the trait is X linked.

I don't know what to do!!

I need help to generate a hypothesis and figure out the expected ratios so I can use a chi test to figure out the validity of my hypothesis.

Can someone please help me set this up? I am behind in this class ..ahhhhhhhh.


p.s. I hate asking someone to help me but I have no other option.

thanks

[mith]

trial and error, make a table of their percentages

[Darwin420]

Yea...I have been doing that....nothing is working.

[MrMistery]

i think you need to employ a chi squared analysis..

[Darwin420]

Yea...I figured it out, thanks.