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Change in Chrom #
genetic disorders, changes in chromosome numbers.
| Question | Answer |
|---|---|
| Down Syndrome | -Change in Chromosome number -trisomy 21, all or part of an extra chromosome in 21. -1/800 births -small chin, round face, almond shaped eyes, shorter limbs, poor muscle tone, heart defects and recurrent ear infections. -Education=improved lifestyle |
| Turner Syndrome | -Chromosome number -monosomy x, absence of sex chromosome -1/2500 girls -short stature, broad chest, low hairline, low-set ears, webbed necks, congenital heart disease, sterile -growth hormones to reach normal height |
| Klinefelter Syndrome | -males have extra X sex chromosome -1/1000 males -small testes, reduced fertility. Variety of physical and mental problems |
| XXX syndrome | -extra X chromosome in human female (trisomy x) -1/1000 females -no unusual physical features. Learning disablities, delayed speech, delayed development of motor skills -no treatment used |
| XYY condition | -extra Y in male sex chromosome -increased growth velocity as a child, high risk of learning disabilities. |