CSD 212 Lecture Notes - Lecture 8: Thalidomide, Retinoid, Dyslexia

• School: Syracuse University
• Department: Communication Sci & Disorders
• Course: CSD 212
• Professor: Staff

Document Summary

Genes occur in pairs are located on 23 pairs of chromosomes. 1 pair: sex chromosomes: female = xx, male = xy. Allele: version of a gene ; what you can see as traits from the parents. 3 modes of transmission: autosomal dominaint, autosomal recessive, x- linked. For a recessive gene to be expressed you need both to be there from each partent. If not the dominant is going to take charge. Autosomal dominant: requires only one affected allele, can come from either or both parents, e(cid:454)a(cid:373)ple: hu(cid:374)ti(cid:374)gto(cid:374)"s disease. If there is a dominant a and a recessive a then you are going to show a. There is a 50% risk that the parent will pass on that disorder. Parent may be a carrier and they might not portray it but they can still pass it on to the child still and it will show up in the child. Xlined: genes responsible for disorder are on the x- chromosome.