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Author Question: The most common of the extra-chromosome conditions, caused by an extra chromosome at the 21st pair, ... (Read 162 times)

student77

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on: Jun 22, 2018
The most common of the extra-chromosome conditions, caused by an extra chromosome at the 21st pair, is ______.
 
  Fill in the blank with correct word

Question 2

A(n) ______ abnormality occurs when a zygote's cells have more or fewer chromosomes than the usual number.
 
  Fill in the blank with correct word


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allisonblackmore

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Reply #1 on: Jun 22, 2018
Answer to Question 1

Down syndrome (or trisomy-21)

Answer to Question 2

age of the mother


student77

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Reply 2 on: Jun 22, 2018
Thanks for the timely response, appreciate it

nyrave

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Reply 3 on: Yesterday
YES! Correct, THANKS for helping me on my review

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