Question by bramos100702: How many Barr bodies would you see in the nuclei of persons with the following sex chromosomes?
How many Barr bodies would you see in the nuclei of persons with the following sex chromosomes?
a.XO none?
b.XX 1?
c.XY none?
d.XXY 1?
e.XXX 2?
f.XXXXX
are the ones i did correct and what about f would there be 3 then?
Best answer:
Answer by emucompboy
The rule is that "all but one X will be a Barr body."
You have 'em all correct.
f. XXXXX means four Barr bodies. But I'm thinking that this combination ain't going to happen in nature, for two reasons:
1. Having that much cruft floating around in the nucleus would be deleterious. Probably lethal, considering a Barr body actually has areas that are expressed.
2. Can you imagine the parents this girl had? I mean c'mon, nondisjunction runs in the family but only for sex chromosomes?
What do you think? Answer below!
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