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These chromosomal abnormalities are the result of
Nondisjunction
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Sex-Linked Traits
Sex-linked diseases are Xlinked The sex chrom. are the X and y
Consider Hemophilia(the inability for blood to clot properly)
Also Colorblindness
(the inability to distinguish certain colors)
Gene that can cause it found on X chrom.
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Sex-Linked Traits
Hemophilia (sex-linked recessive)
Females/Males:
XH XH Female, normal XH Xh Female, normal (carrier)
Xh Xh Female, hemophilia
XHy Male, normal
Xhy Male, hemophilia
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Inheritance Patterns
AUTOSOMAL DOMINANT
Only one gene on one chrom. is needed to displaythe disorder
AUTOSOMAL RECESSIVE Two copies of gene must be present to display the
disorder
X-Linked DOMINANT
Genes on the X chrom. that are dominant
X-Linked RECESSIVE (like hemophilia)
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Pedigrees
A pedigree chart is a tool used to show all theknown phenotypes of an organism and itsancestors
Used in human genealogy study
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AUTOSOMAL RECESSIVE
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Autosomal Dominant
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X linked Recessive
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