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Percent of human births with autosomal trisomies (mainly down syndrome)

Value	0.14 %
Organism	Human Homo sapiens
Reference	Griffiths, Anthony JF Miller, Jeffrey H Suzuki, David T Lewontin, Richard C Gelbart, William M. An Introduction to Genetic Analysis (6th ed.)(1996). Chapter 9 Chromosome Mutation II: Changes in Chromosome Number, p.263 Table I, New York: W. H. Freeman. Table - link
Comments	Down syndrome (trisomy 21) is produced (between conception and birth) at a frequency almost 20 times higher than in live births.
Entered by	Uri M
ID	105366