. Author manuscript; available in PMC: 2010 Jul 1.

Published in final edited form as: Am J Med Genet A. 2009 Jul;149A(7):1415–1420. doi: 10.1002/ajmg.a.32932

Table-I. Frequency distribution of observed recombination events for maternally derived NDJ groups among different maternal age groups.

Frequency distribution of recombination in meioses among the maternal age groups of both MI and MII cases.

Types of NDJ	Maternal age group	Sample Size	Frequency of observed number of recombination events
Types of NDJ	Maternal age group	Sample Size	0	1	≥ 2
MI	Young ( ≤28yrs )	60	0.8	0.18	0.02
	Middle (29–34yrs)	26	0.88	0.08	0.04
	Old ( ≥35 )	21	0.67	0.24	0.09
MII	Young ( ≤28yrs )	11	-	0.73	0.27
	Middle (29–34yrs)	10	-	0.8	0.2
	Old ( ≥35 )	10	-	0.9	0.1

NDJ - Nondisjunction, MI-Meiosis I, MII - Meiosis II.