PSYB32H3 Lecture Notes - Gregor Mendel, Chromosome Abnormality, Mendelian Inheritance
Document Summary
From the moment they are born, babies differ from one another in: physical appearance & behaviour. Transactions between hereditary and environmental factors begin before birth. Such transactions between genes and the environment make each newborn unique. Genotype: the particular set of genes that a person inherits from her parents. Phenotypes: the visible expression of the person"s particular physical and behavioural characteristics. Phenotypes are created by the interaction of a person"s genotype, with the environment. Ex. motor abilities, intellectual skills, social behaviour, and personality traits. The female egg: (ovum: the largest human cell, 90 000x heavier then sperm, has genetic info (23 chromosomes) The male sperm: smallest of all human cells, a head with a whip-like tail, has genetic info (23 chromosomes) Each chromosome is homologous: the shame and functions of 23 female"s are = to 23 male"s. In the women"s oviduct female egg and male sperm unite to create: zygote which has 23 chromosome pairs or 46 chromosomes.
