PSYC 2000 Chapter : Development Across The Lifespan
Document Summary
Chap 8: development across the lifespan (full chapter) Issues in studying human development: human development: scientific study of the changes that occurs in people as they age, from conception until death. The basic building blocks of development: chromosomes, genes, and dna, genetics is the science of inherited traits, dna: special molecule that contains the genetic material of organism, two long sugar-phosphate strands, linked by amines (rungs of the ladder). Contains genetic codes for hair/eye color, muscle, skin, etc: gene: section of dna having the same arrangement of chemical elements. 2 recessive genes, one from each parent: cystic fibrosis, sickle-cell anemia, tay-sachs disorder, and. Pku: chromosome disorders, down syndrome (extra chromosome), klinefelter"s syndrome (23rd set is sometimes xxy; males have reduced masculine characteristics), turner"s syndrome (23rd pair missing an x, females end up very short, infertile, and sexually underdeveloped) Placenta and umbilical cord form: cells begin to develop into specialized cells, in preparation to become various parts of the body.
