Xy = XX= female male Female karyotype Male karyotype.

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Presentation transcript:

Xy = XX= female male Female karyotype Male karyotype

 Nondisjunction: failure of chromosomes to separate during meiosis 1 or 2  Results in an extra chromosome or a missing chromosome  hill.com/olcweb/cgi/pluginpop.cgi?it=swf::550::400::/sites/dl/ free/ /383925/Chapter11_NGS_VisualizingNondisju nction_10_10_06.swf::Visualizing%20Nondisjunction hill.com/olcweb/cgi/pluginpop.cgi?it=swf::550::400::/sites/dl/ free/ /383925/Chapter11_NGS_VisualizingNondisju nction_10_10_06.swf::Visualizing%20Nondisjunction  XO- Turner Syndrome  XXX- Trisomy X  XXY- klinefelter Syndrome  XYY- Jacob Syndrome  Very often, symptoms are slight due to X-inactivation and the small amount of genes found on the Y chromosome

SEX LINKED TRAITS

X-LINKED GENES: Genes carried on the X chromosome Hemophilia Color blindness Baldness Muscular Dystrophy

Mother Without hemophilia = X X With hemophilia = X X Father Without hemophilia = X y With hemophilia = X y H H h h CARRIER H h