PSYB64H3 Chapter 10: Psyb64 chapter 10 Sexual behaviour
Document Summary
Down syndrome, in which an individual has three copies of the 21st chromosome females with an xxx genotype experience the largest reduction in iq. Turner syndrome child receives only a single x chromosome (45, x) instead of the usual pair (46, xx or 46, xy), turner syndrome a condition caused by a xo genotype, characterized by frequent abnormalities of the ovaries and inferititlity. A reaction between testosterone from the testes and the enzyme 5-alpha- reductase produces 5-alpha-dihydrotestosterone. Development at puberty secondary sex characteristics: characteristics related to sex that appear at puberty, In males, this burst of additional androgens stimulates muscular development, maturity of the external genitalia, facial hair, and enlargement of the larynx, which leads to a deeper voice. In conjunction with lh and fsh, testosterone begins to regulate the production of sperm. In females, estradiol produces breast growth, maturity of the external genitalia, maturity of the uterus, and changes in fat distribution and quantity.
