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17 Cards in this Set
- Front
- Back
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Homozgous
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both alleles identical
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Genotype
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complete set of genes and alleles
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Phenotype
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observed physical and functional traits
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Law of Segregation
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reproductive cells carry only one copy of each gene
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Law of independent assortment
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Genes for different traits are seperated from each other independently during meiosis
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Dominant Alleles
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gene always expressed, even if heterozygous
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Recessive Alleles
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tow copies of gene needed to be expressed, mst b homozygous
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Incomplete Dominance
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heterozygote is an intermediate phenotype
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Codominance
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both phenotypes equally expressed
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Polygenic Inheritance
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Multiple genes involved
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Linked Genes
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may be inherited together if close on a chromosome
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Pedigree Chart
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Inheritance pattern fo an X-Linked recessive disease
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Sex-Influenced traits
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Affected by the presence of testosterone, estrogen
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Alterations of the number of sex chromosomes
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XYY- Double Y syndrome
XXY- Double X syndrome XXX- Trisomy X Syndrome XO- turner syndrome, NO Y! |
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Huntington Disease
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Dominant Lethal Allele, always expressed at midlife, always lethal
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Mutations that involve recessive alleles
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Phenylketonuria and Tay-Sachs disease
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Protein Functions
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Hormones, Enzymes, structural, neurotransmitters
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