9.2
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| genotype | the entire genetic makeup of an organism; also the combination of genes for one or more specific traits
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| phenotype | an organism's appearance or other detectable characteristic that results from the organism's genotype and the environment
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| homozygous | describes an individual that has identical alleles for a trait on both homologous chromosomes
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| heterozygous | describes an individual; that has two different alleles for a trait
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| probability | the likelihood that a possible future event will occur in any given instance of the event; the mathematical ratio of the number of times one outcome of any event is likely to occur to the number of possible outcomes of the event
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| monohybrid cross | a cross between individuals that involves one pair of contrasting traits
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| Punnett Square | a graphic used to predict the results of a genetic cross
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| genotypic ratio | the ratio of the genotypes that appear in offspring
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| phenotypic ratio | the ratio of phenotypes produced by a cross
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| testcross | the crossing of an individual of unknown genotype with a homozygous recessive individual to determine the unknown genotype
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| complete dominance | a relationship in which one allele is completely dominant over another
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| incomplete dominance | a condition in which a trait in an individual is intermediate between the phenotype of the individuals two parents because the dominant allele is unable to express itself fully
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| codominance | a condition in which both alleles for a gene are fully expressed
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| dihybrid cross | a cross between individuals that have different alleles for the same gene
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Created by:
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