PSY210H5 Chapter Notes - Chapter 2: Chorionic Villi, Amniotic Sac, Chromosome Abnormality
Document Summary
Chapter 2: genotype: particular set of genes person inherits form parents, phenotype: created by the interaction of genotype (genetic makeup) with the environment. It"s the visible expression of physical/behavioural characteristics: ovum: female germ cell, egg. Largest human cell, 90,000 times heavier than the sperm: sperm: male germ cell. Sperm is the smallest of all human cells: chromosomes: thread like structures that are in the nucleus. Of the 46 pairs of chromosomes in you, 23 come from mom and 23 come from dad. Each chromosome is homologous (similar in shape and function). Vs sex chromosomes: binding element of a chromosome is dna (deoxyribonucleic acid). Its building blocks are called nucleotides: nucleotides: a compound containing a nitrogen base, simple sugar, and a phosphate group. 4 different nitrogen contaning bases: adenine, thymine, cytosine, guanine. Dna segment splits down the middle and the base pairs are no longer bonded with each other, and they bond with other free nucleotides.
