MartinChapter3st - Chapter 3 Chapter...

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Chapter 3 Chapter 3 Biological Foundations of  Development This multimedia product and its contents are protected under copyright law. The following are prohibited by law: •Any public performance or display, including transmission of any image over a network; •Preparation of any derivative work, including the extraction, in whole or in part, of any images; •Any rental, lease, or lending of the program.
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Genetics Genetics Genome The complete set of genes Chromosomes Tightly coiled ribbons of DNA and proteins Humans have 46
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DNA DNA Double helix Matched base pairs on  the rungs specify genetic  information Mitosis Helix breaks apart and  bases find new partners Two copies are made  
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Genes and Chromosomes Genes and Chromosomes Genes Portions of DNA that encode for specific proteins Gametes Ova and sperm Each have only one pair of 23 chromosomes Formed via meiosis
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Genes and Chromosomes Genes and Chromosomes Karyotype Ordered “picture” of  chromosome pairs Autosomes First 22 pairs Sex chromosomes 23 rd  pair Females: XX Males: XY  
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Genotypes and Phenotypes Genotypes and Phenotypes Genotype Genetic code Phenotype Expression of the genotype Alleles Copies of the autosomal genes Each parent contributes one allele
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Dominant Transmission Dominant Transmission A gene whose code is  expressed when only  one copy of the gene  is present Insert Image #dv1644024, Getty Images CD  DV816 “Lifetime Learning”
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Recessive Transmission Recessive Transmission A gene that’s code is not  expressed in the  presence of a dominant  gene Insert Image #dv1644086, Getty Images CD  DV816 “Lifetime Learning”
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This note was uploaded on 05/27/2011 for the course PSY 105 taught by Professor Hamilton during the Spring '11 term at Moraine Valley Community College.

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MartinChapter3st - Chapter 3 Chapter...

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