Genetics college biology final
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Last updated 10:03 PM on 12/18/25
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14 Terms
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Allele
Different versions of the same gene
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Dominant allele
Allele expressed if present
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Recessive allele
Allele expressed only when two copies are present
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Homozygous
Two identical alleles; BB or bb
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Heterozygous
Two different alleles; Bb
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Monohybrid cross
Punnett square tracking one trait
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Dihybrid cross
Punnett square tracking two traits
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Genotype
Genetic makeup of an organism
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Phenotype
Physical appearance of a trait
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Phenotypic ratio
Ratio predicting trait outcomes; example: 3:1
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Incomplete dominance
Blended phenotype
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Codominance
Both alleles fully expressed
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Multiple alleles
Trait controlled by more than two alleles
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Sex-linked trait
Trait located on a sex chromosome
Note 
Flashcards (27)