HLTC23H3 Study Guide - Subcutaneous Tissue, Skin Fold, Menarche
Document Summary
Lecture 4: variations in human growth and development january 30, 2012. Humans: 99. 9% identical at dna sequence level (o. 1%) difference: chimps: 2-3x different, orang-utans: 8-10x. Genotype: dna sequence level of comparison: genetic blueprint. Phenotype: physical manifestation of your genes: how you look like is the expression of genes, eg. height. Rwanda: tutsi, hutu, twa: within these groups, there"s variations; height. Comparative growth (children/ adolescence: skeletal measures (height, proportions, dental development (eruption, body composition/ weight (fat, muscle, sexual maturation (esp. Can be variations in how the curves can be stretched horizontally or vertically. Part of it is genetics and also environment over time. Height is determined by less access to resources to food, greater demands on the body such as labour and b=poor health care or disease. Result of other factors other than genetics, such as culture. Guatemala maya: generally shorter, result of stunting due to poor nutrition, they moved to the us and their height increased by 5 cm.
