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Types of Inheritances II
Pp 237,
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Sex linked traits Recessive disorder/trait found on the “X” chromosome
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Males are more likely to have an x- linked disorder
Possible genotypes for males: XRy, Xry Possible genotypes for females: XRXR, XRXr, XrXr 50% chance for males, 33% chance for females
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Possible genotypes and phenotypes: XR XR = normal vision XR Xr = normal vision Xr Xr = color blind XR Y = normal vision Xr Y = color blind
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Multiple allele trait Controlled by more than two alleles in one gene
EX. Bloodtype
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Blood Types IA : produces A proteins on surface of cell IB : produces B proteins i : does not produce proteins
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Still only inherit one copy from each parent for a total of two alleles but have a few to combine
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Practice Problem What possible blood types could the children of a homozygous A female and a male with AB blood have? Parents genotype: _____ x ______
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