ch10_lecture - Observable Patterns of Inheritance Chapter...

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Observable Patterns of Inheritance Chapter 10
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Earlobe Variation * Whether a person is born with attached or detached earlobes depends on a single gene Gene has two molecular forms (alleles)
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Earlobe Variation * You inherited one allele for this gene from each parent Dominant allele specifies detached earlobes Recessive allele specifies attached lobes
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Dominant & Recessive Alleles * If you have attached earlobes, you inherited two copies of the recessive allele If you have detached earlobes, you may have either one or two copies of the dominant allele
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The Garden Pea Plant* Self-pollinating True breeding (different alleles not normally introduced) Can be experimentally cross- pollinated
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Genes * Units of information about specific traits Passed from parents to offspring Each has a specific location (locus) on a chromosome
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Alleles * Different molecular forms of a gene Arise by mutation Dominant allele masks a recessive allele that is paired with it
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Allele Combinations * Homozygous having two identical alleles at a locus AA or aa Heterozygous having two different alleles at a locus Aa
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ch10_lecture - Observable Patterns of Inheritance Chapter...

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