Prenatal Development Birth SV PPT - Prenatal Development...

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Prenatal Development & Birth
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Reproduction Sperm & egg (gametes) each have 23 chromosomes Resulting zygote has 23 chromosome pairs 3
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Relationship b/w Chromosome, DNA, and Individual Genes
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Genetic Code DNA duplicates itself through mitosis (chromosomes copy themselves) Genes: The segments on a DNA molecule that act as hereditary blueprints for the organism’s development Model of DNA 3
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Genotype The genetic code a person inherits Phenotype The observable trait a person shows, resulting in part from his or her inherited genotype Genotype v. Phenotype 8
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Range of Reaction 9
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The interacting effects of genetics and the environment on the development of traits and characteristics Gene x Environment (GxE) Interaction 8
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Another visual Monozygotic Dyzygotic
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Fraternal Twins 3
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Identical Twins 3
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Embryo Implantation - 8 weeks Most rapid period of growth Groundwork laid for all body structures and internal organs
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Fetus By 12 weeks , sex can be discerned and the baby practices many bodily functions
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