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NS FL 3 Bio Question

Started by sirromta
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sirromta

sirromta

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Can someone please fill me in onto how they may recognize this is a Trisomy?
1621818878679.png
 
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Each region of darkness represents an X chromosome. Notice that, for the offspring, the bottom region is about twice as dense/dark as it is on either parent. That means an extra X chromosome is present, ergo, trisomy.
 
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