FMLY 1010 Lecture Notes - Lecture 17: Trisomy, Color Blindness, Haemophilia

• School: University of Manitoba
• Department: Family Social Sciences
• Course: FMLY 1010
• Professor: Christine A.Schippers

Document Summary

80% can survive to adulthood with proper treatment. Tay-sachs disease common in eastern european jewish ancestry & french canadians. Baby with tay-sachs likely to be severely mentally delayed and blind. Hu(cid:374)ti(cid:374)gto(cid:374)"s disease dominant disorder, usually not diagnosed until adulthood, causes brain to deteriorate, affects psychological & motor functions. Genes that cause sex-linked disorders found on x chromosome. Most are caused by recessive genes: red-green colour blindness difficulty distinguishing between red and green when they are next to each other (recessive, hemophilia blood lacks chemical components to clot (almost unknown in girls) Fragile-x syndrome x chromosome with a fragile spot, causes developmental delay that becomes worse as child gets older. Problems arise when a child is born with too many or too few chromosomes = chromosomal anomaly (chromosomal error) Trisomy = condition in which a child has 3 copies of a specific autosome. Trisomy 21 (cid:862)down syndrome(cid:863) intellectually delayed, distinctive facial features, health concerns (hypothyroidism, hearing loss, heart anomalies) o.