PSYC 302 Lecture Notes - Synaptic Pruning, Twin Study, White Matter

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9 Dec 2013
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What influences development? genetics (nature) experience (nuture) genes are contained in strands of dna genes: make proteins which cause changes (build brain cells, cause puberty, etc) chromosomes: contain dna. What makes humans unique? mitosis: dipoiad cells meiosis: haploid cells; specifically sex cells crossing over: chromosomes get so close together that there is swappng of genetic material. Alleles biggest aspect of variation we inherit our alleles from our parents recessive genes will only be expressed if you get those recessive alleles from both parents only 1/3 of genes have these dominant and recessive traits. 1 of each allele: heterozygous phenotype: expresses dominant allele green eyes are dominant to blue eyes. Pku is an amino acid and some people do not have the ability to metabolize it if you can be diagnosed as someone with this deficiency you will be completely fine if you dont you can get severe retardation.

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