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15 Cards in this Set
- Front
- Back
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Gene
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length of DNA coding for a specific gene product
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allele
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variations of a gene
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t/f
each person, and therefore the genetic population, can only have two alleles for a given gene |
f
a genetic population can have multiple alleles while a person is limited to two alleles |
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pleiotrophism
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one gene alters many unrelated phenotypes
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polygenism
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one trait influenced by many genes
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penetrance
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likelihood a person with a given genotype will express the expected phenotype
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epistasis
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expression of alleles for one gene is dependent on another gene.
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incomplete dominance
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heterozygous mix of dominant alleles
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codominance
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dominant alleles are both expressed but not blended
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nondisjunction
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failure of choromosomes to seperate in meiosis I (homologous) or sister chromatids in meiosis II
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Principles of Mendelian Genetics
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1. principle of segregation
2. law of independent assortment |
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Principle of segregation
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two alleles of an individual are seperated and possed on to the next generation singly
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Law of Independent Assortment
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alleles of one gene will seperate into gametes independently of the other alleles
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Linkage
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failure to follow the law of independent assortment
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population
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members of a species that mate and reproduce with eachother.
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