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15 Cards in this Set
- Front
- Back
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a graphic used to predict the chances that offspring will inherit an allele for a trait
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punnett square
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the crossing of an individual of unknown genotype with a homozygous recessive individual to determine the unknown genotype
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test cross
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the likelihood that a possible future event will occur in any given instance of the event.
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probability
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a diagram that shows the occurrence of a genetic trait in several generations of a family
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pedigree
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a trait that is determined by a gene found on one of the sex chromosomes
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sex-linked trait
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a characteristic of a living thing that is determined by many genes
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polygenic trait
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a condition in which a trait in an individual is intermediate between the phenotype of the individual's two parents because the dominant allele is unable to express itself fully
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incomplete dominance
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more than two alleles (versions of a gene) for a genetic trait
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multiple alleles
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a condition in which both alleles for a gene are fully expressed
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codominance
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one of the two strands of a chromosome that become visible during meiosis or mitosis
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chromatid
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the area of the chromosome that holds the two sister chromatids together during mitosis
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centromere
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chromosomes that have the same order of genes, that have the same structure, and that pair during meiosis
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homologous chromosomes
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a cell that contains two haploid sets of chromosomes
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diploid
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cell, nucleus, or living thing that has only one set of unpaired chromosomes
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haploid
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the cell that results when gametes join; a fertilized egg
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zygote
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