PSYB32H3 Chapter Notes - Chapter 2: Phenylalanine, Fetus, Chorionic Villi

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12 Oct 2012
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Psyb20 chapter 2 heredity and the environment. 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. Oviduct is where sperm and egg unite to create baby. Each chromosome is homologous: the same in size and functions of 23 female"s are = to 23 male"s. Homologous- similar in shape and size tf allow pairing to be possible. In the women"s oviduct female egg and male sperm unite to create: zygote which has 23 chromosome pairs or 46 chromosomes.

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