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julia.s julia.s
wrote...
Posts: 79
Rep: 1 0
11 years ago
In one kind of abnormal chromosome inheritance called
Down syndrome, a child has three copies of
A. chromosome X.
B. chromosome 23.
C. chromosome Y.
D. chromosome 21.
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wrote...
11 years ago
D
wrote...
11 years ago
D. chromosome 21
wrote...
11 years ago
D.
wrote...
11 years ago
You should do your own home work, you go to school to learn how to learn. Having people on Yahoo do your homework isn't going to teach you anything but how to cheat. I guess if all you want to do if flip burgers all your life then it will be OK.

By the way it is D.
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