PSYCH 1XX3 Lecture Notes - Soltyrei, Abo Blood Group System, Y Chromosome
Document Summary
Review -> maturation: biologically-timed unfolding of changes within an individual according to a genetic plan. Genes and environment interact to determine who one becomes. Zygote is formed when a sperm penetrates an ovum. Zygote: single cell containing 46 chromosomes, 23 from each parent. Chromosome: threadlike structure made from deoxyribonucleic acid (dna) Genes provide the chemical code for development and are contained in dna segments. Human genome project: human chromosomes contain between 30 000 to 40 000 genes (about. Zygote quickly divides at an exponential rate (2 cells -> 4 cells -> 16 cells: birth: billions of different cells present, each with the same 46 chromosomes inherited at conception. Each parent can produce more than 8 million different genetic combinations from his sperm or her ova: therefore, each couple could theoretically produce 64 trillion genetically distinct offspring, exception: identical twins. Monozygotin twins: genetically-identical individuals originating from the same sperm and ovum (formed one zygote, split into two separate zygotes)
