PSYCH 1XX3 Lecture Notes - Lecture 1: Abo Blood Group System, Phenotypic Trait, Human Genome Project
Document Summary
Chromosome is a thread-like structure that is made from deoxyribonucleic. Chromosomes contain 30 000 to 40 000 genes. Grows from two cells to four cells to 16 cells and so on. At birth you end up with billions of different cells each with same 46 chromosomes inherited at conception. Each parent can produce more than 8 million different genetic combinations from his sperm or ova. Any given couple could produce 64 trillion genetically distinct offspring. Male determines the gender of the child. X and y chromosomes on 23rd pair. Mother always passes on an x chromosome. If father passes an x = female, if passes y = male. The 46 identical chromosomes in each of your cells translates into the roughly 30 to 40 thousand genes that make up you genotype. Expression of the genotype into an observable traits and characteristics is called the phenotype. The expression of an individual"s genotype in terms of observable characteristics.
