PSYB64H3 Study Guide - Final Guide: Hemispherectomy, Metastasis, Thalidomide
11 Aug 2016
School
Department
Course
Professor
Document Summary
Turner syndrome occurs when a child only receives a single x chromosome typically affects female genitalia experience abnormal ovary development (no eggs or low levels of female hormones) occurs in 1 in 2500 live births. Klinefelter syndrome occurs in 1. 79 out of 1000 male births occurs when 47 chromosome contains xxy genotype (vs normal xy) resulting in low fertility and may require hormone treatment. May also experience cognitive difficulties and social awkwardness. 47 xyy occurs in 1/1000 male births experience slights lower than average iq. The three stages of prenatal development: development of the gonads (internal organs) Up until 6 week after conception, male and female embryos gonads are identical and undifferentiated. The sex-determining region of the y chromosome (sry gene) is expressed in male embryos at 6 weeks. Sry gene produces the testis-determining factor this causes the primordial gonads to develop in the way of testes. Alternate gene guide the development of gonads into ovaries in female embryos.
