Chapter 2 - Genetic Bases of Child Development

Chapter 2 - Genetic Bases of Child Development - Chapter 2...

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Chapter 2 – Genetic Bases of Child Development I. 2.1 Mechanisms of Heredity The Biology of Heredity o Chromosomes – tiny structures in the nucleus that contain genetic material. o In vitro fertilization – involves mixing sperm and egg together in a lab dish and then placing several fertilized eggs in a woman’s egg. o Autosomes – the first 22 pairs of chromosomes; about the same size. o Sex chromosome – 23 rd pair. o DNA – the molecule that each chromosome actually consists of; spiral staircase. o Gene – group of nucleotide bases that provides a special set of biochemical instructions. Single Gene Inheritance o Alleles – different forms of genes. o Incomplete dominance – where one allele doesn’t dominate another completely. o Sickle-cell trait – one dominant and one recessive trait; In most situations, people with SCT have no problems, but when they are seriously short out of oxygen they suffer a temporary mild form of the disease. Genetic Disorders
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This note was uploaded on 04/29/2011 for the course PSYC 2350 taught by Professor Miller during the Spring '08 term at University of Houston.

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Chapter 2 - Genetic Bases of Child Development - Chapter 2...

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