Section 6.4: Traits, Genes, and Alleles – Flashcards
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gene
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part of DNA that directs a celll to make a certain protein
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locus
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location
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genome
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all of an organism's genetic material
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genotype
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makeup of a specific set of genes; what the letters say
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homozygous
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two alleles that are the same at a specific locus
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heterozygous
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two alleles that are different at a specific locus
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symbols for alleles
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dominant: uppercase letters recessive: lowercase letters
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dominant
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expressed as a phenotype when at least one allele is dominant
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recessive
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expressed as a phenotype only when two copies are present
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phenotype
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physical expression of a trait; most traits occur in a range and do not follow simple dominant-recessive patterns (not usually either-or traits)
