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22 Cards in this Set
- Front
- Back
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Incomplete dominance
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When one allele is not completely dominant over the other.
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Codominance
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When two alleles affect the phenotype in separate, distinguishable ways.
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Polygenic Traits
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Traits controlled by two or more genes.
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Karyotype
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A picture of chromosomes.
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Sex chromosomes
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The two chromosomes that determine the individual's sex.
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Autosomes
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The other 44 chromosomes.
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Turners syndrome
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Where a female only inherits one X chromosome. The female remains sterile.
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Klinefelter's syndrome
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When a male inherits more that one X chromosome.
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XYY triat
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When a male has more the one Y chromosome.
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Trisomy X
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When a female inherits an extra X chromosome.
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Hybrids
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The offspring of crosses between parents with different traits.
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Law of Dominance
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In a cross of parents that are pure for contrasting traits, only one form of the trait will appear in the F1 generation.
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Law of Independent Assortment
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Alleles for different traits are distributed to sex cells independently of each other.
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Law of Segregation
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During formation of gametes, the alleles responsible for a trait separate from each other.
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Dominant allele
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The trait that is expressed.
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Recessive allele
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The trait that will be hidden.
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Homozygous
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Two identical alleles for a given trait.
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Heterozygous
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Two different alleles for a given trait.
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Phenotype
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The physical appearance of the alleles.
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Genotype
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The symbolic representation of the alleles.
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Monohybrid Cross
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A breeding experiment looking at only one trait.
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Genetic diversity
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The total sum of all the different forms genes found in a species.
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