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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)

http://www.execulink.com/~ekimmel/drag_gr11/pedigree.htmhttp://www.execulink.com/~ekimmel/drag_gr11/pedigree.htm

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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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