PSYCH 1XX3 Lecture Notes - Lecture 1: Abo Blood Group System, Phenotypic Trait, Human Genome Project
27 Jan 2016
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Zygote: when a sperm penetrates an egg, a new cell is performed. Single cell contains 46 chromosomes, 23 from each parent. A chromosome is a threadlike structure that is made from deoxyribonucleic acid dna. Segments of dna comprise genes, which provide the chemical code for development. Results from the human genome project have estimated that our chromosomes contain between 30,000 to 40,000 genes. Zygote quickly divides, growing from 2 cells to 4 cells and so on. Come from one zygote then split into 2 separate zygotes. Male determines the gender of the child. Each of us has 23 pairs of chromosomes, including 22 autosomes, which are similar in males and females. It is the 23rd chromosome which determines a person"s gender. A female will carry two 2 chromosomes while a male will carry and. If he passes on an x, the child will be a female. If he passes on an y, the child will be a male.
