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any change in the normal structure or number of chromosomes; often results in physical or mental abnormalities
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chromosomal abnormality consisting of the absence of one chromosome from the normal diploid number
chrosomal abnormality in which there is one more than the normal number of chromosomes in a cell
any disease or abnormality that is determined by the sex hormones
a congenital disorder caused by having an extra 21st chromosome; results in a flat face and short stature and mental retardation
congenital tendency to uncontrolled bleeding; usually affects males and is transmitted from mother to son
a chromosomal disorder in females who have only one X chromosome; marked by dwarfism and heart abnormalities and underdeveloped sex organs
a state or condition markedly different from the norm
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