Genetics: Exceptions
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Last updated 2:00 AM on 1/6/26
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10 Terms
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incomplete dominance
when one allele doesn’t completely mask another resulting in a blending of both.
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codominance
when one allele doesn’t mask another resulting in an individual that will show both alleles at the same time
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sex-linked traits
trait that is controlled by a gene found on a sex chromosome
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pedigree
a diagram that shows the occurrence of a genetic trait in several generations of a family
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carrier
individual who has one copy of the allele for a recessive disorder and does not exhibit symptoms
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double trait (two trait) cross
cross that shows how two different traits are passed on from parents to offspring
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polygenic inheritance
when a trait is influenced by two or more genes
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multiple alleles
having three or more alleles for a given gene
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autosomal chromosome
one of the numbered chromosomes (1-22)
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sex chromosome
chromosome involved in sex determination (X or Y)
