PSYC 2013 Chapter Notes - Chapter 3: Sickle-Cell Disease, Down Syndrome, Rein
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Chapter 3 (pg. 67-92: gamete- reproductive cell, zygote- the combination of 2 genes, 1 sperm and 1 ovum. Co(cid:374)tai(cid:374)s all the perso(cid:374)"s ge(cid:374)es, (cid:449)hi(cid:272)h affe(cid:272)t e(cid:448)ery aspe(cid:272)t of. Humans have 23 pairs (46 in total: gene- the instructions in the 46 chromosomes are organized into genes, allele- variation of a particular gene. Although all humans have most of the same genes with identical codes, those tiny variations of certain genes make a person unique: rna- surround each gene. Methylation- the addition of materials that enhances, transcribes, connects, empowers, silences, and alters genetic instructions. Rna regulates and transcribes genetic instructions, turning some genes and alleles on or off. Genetic variation can occur because of prenatal rna or because of later factors, biological and psychological: epigenetics- study of how genes change in form and expression. Every trait arises from a combination of genes, each with a small potential impact. States that events and circumstances surrounding the genes determine.
