PSYC 101 Lecture Notes - Lecture 12: Tabula Rasa, Y Chromosome, Encephalization

• School: UBC
• Department: Psychology
• Course: PSYC 101
• Professor: Luke Clark

Document Summary

Genes is the major unit of hereditary transmission. Dna (deoxyribonucleic acid) a molecule that carries the genetic instructions used in the growth, development, functioning, and reproduction of all known living organisms and many viruses. Chromosomes strands of dna wound around each other in a double-helix configuration. Every cell in our bodies has 23 pairs of chromosomes. Genes are segments on the strand of dna. Darwin"s survival of the fittest: variation, selection, retention. Variation a genetic event that causes the individuals or groups of a certain type or species to possess different characteristics from one another. Selection the differential survival and reproduction of individuals due to differences in phenotype. Retention the features of the fit variants are retained and passed on. The sex of human depends on whether the sperm that fertilizes the ovum caries an x or a y chromosome. Males have one x and one y chromosomes. Bipedalism ability to move about on two legs.