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+[[G11 Pre-AP Biology]]
+![[Pasted image 20261015104528.png]]
+![[Pasted image 20261015104509.png]]Non-disjunction is the failure of chromosomes seperating.
+Aneuploidy is when the number of chromosomes is incorrect.
+Trisomy is an extra chromosome.
+Monosomy is missing chromosomes.
+Polyploidy are extra set(s) of chromosomes.
+Triploidy is 3 sets of chromosomes (3n).
+Tetraploidy is 4 sets of chromosomes (4n).
+Octaploidy is 8 sets of chromosomes (8n).
+
+Trisomy 21 is Down's syndrome.
+Trisomy 18 is Edward's syndrome.
+Trisomy 13 is Patau's syndrome.
+47 XXY is Klinefelter's syndrome.
+47 XYY is Jacob's syndrome.