An X-borne dominant mutation as a cause of nondisjunction in mothers of children with Down's syndrome.
D000328:Adult; D004314:Down Syndrome / Q000235:genetics*; D005260:Female; D006801:Humans; D008297:Male; D008423:Maternal Age; D008875:Middle Aged; D010331:Paternal Age; D011247:Pregnancy; D012730:Sex Chromosomes; D014960:X Chromosome