anyone get the DROSOPHOLIA one?

[PeruvianDoctor]

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The one about the X chromosome?? WTF was that about?

 

[Nuel]

Do you mean the that about eye color? vg and vg+? After having a hard time with PS and VR, I was wise enough to do it last. It made sense to me, there probably wasn't any need to skip it. However, it was thinky.

 

[benzino]

I had that passage too...I found it quite difficult to understand...anyone know the answer for the question of which genes were x-linked?

 

[EvoDevo]

I had that passage too...I found it quite difficult to understand...anyone know the answer for the question of which genes were x-linked?

yes, vg and vg+ were x-linked.

 

[superdevil]

vg and vg+? thank god. so that's one down, 76 to go.....

 

[bigdan]

EvoDevo-
How do we know that they're X-linked?

dc

 

[Nuel]

How do we know that they're X-linked?

dc

it was stated in the passage that X-linked genes are usually expressed in the males since the Y chromosome has few genes. On the table only the vg and vg+ alleles were expressed in males and females so it was my guess--i couldn't really justify it, but that was where my reasoning led me.

 

[premyo2002]

EvoDevo-
How do we know that they're X-linked?

dc

You have to look at the ratio of the F2 generation.

 

[blz]

I didn't have this passage but if they gave you data you could tell if they were linked by looking at whether or not there was deviation from typical mendelian ratios.

 

[IcedCube]

the other answers were two different genes, ie vg+ and v+ or something. only vg and vg+ were the same allele...