Parents genetic contribution to the childs genotype 2

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Unformatted text preview: ions 1.  Parents’ genetic contribution to the child’s genotype 2.  Contributions of the child’s genotype to his or her own phenotype 3.  Contribution of the child’s environment to his or her own phenotype 4.  Influence of the child’s phenotype on his or her environment Relation 1: Parents’ and Child’s Genotypes   Genetic material is passed on as chromosomes—long, threadlike molecules made up of DNA -carry all the biochemical instructions involved in the formation and functioning of an organism -genes are sections of chromosomes that are the basic units of heredity for all living things Karyotype Sex Determination Sex chromosomes determine an individual’s sex. Females have two X chromosomes in the 23rd pair, whereas males have an X and a Y chromosome. -a gene on the Y chromosome encodes the protein that triggers the formation of the testes, which subsequently produces testosterone, which in turn takes over the molding of maleness 3 5/22/13 Diversity and Individuality   Mutations: changes in sections of DNA   Random assortment: the shuffling of the 23 pairs of chromosomes in the sperm and egg ; chance determines   Crossing over: the process by which sections of DNA switch from one chromosome to another during which member of the pair goes into the new sperm and egg meiosis, further increasing genetic variability Relation 2: Child’s Genotype and Phenotype   Every cell in your body contains copies of all the genes you received from you...
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This note was uploaded on 01/21/2014 for the course PSYCH 302 taught by Professor Whitneyweikum during the Fall '13 term at University of British Columbia.

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