GENINFER

helps counselors provide genetic advice

likelihood child will be a hemophiliac

female: XX, male : XY

hemo is recessive on X chromosome

female can carry on one X without symptoms

male with bad X is hemo

female with carrier mother, normal father: .5 chance of carrier

male with carrier mother, normal father: .5 chance of hemo

family tree ISA BN polytree

reference: Peter Szolgovits 1992 "compilation for fast calculation over pedigrees", cytogenetic and cell genetics, vol 59