Reproduction2 - 2 processes of cell production: Mitosis:...

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2 processes of cell production: Mitosis: Duplication of genetic material Creates body (somatic) cells Occurs throughout body Occurs throughout life Meiosis: Splitting of genetic material Creates sex cells (egg and sperm) Occurs in ovaries and testes Females: Begins prenatally At puberty, an egg completes splitting at monthly ovulation Males: Begins at puberty Continues for rest of life Genes are expressed through: Gene-gene interaction Additive pattern – certain kinds of traits, is a blending of the two
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versions, e.g. skin color, height Dominant-recessive pattern, e.g. eye color Recessive allele expressed: Only when paired w/another version of itself Homozygous genotype Dominant allele expressed: When paired w/another version of itself Homozygous genotype When paired with a recessive allele Heterozygous genotype Gene-environment interaction (in text) Abnormalities involving chromosomes Most chromosomal abnormalities are due to mistakes during meiosis: Uneven meiotic split; primitive egg cell w/46 chromosomes, one egg cell
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This note was uploaded on 10/25/2008 for the course PSY 304 taught by Professor Repp during the Fall '08 term at University of Texas at Austin.

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Reproduction2 - 2 processes of cell production: Mitosis:...

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