Sex Linked Traits

Karyotype pictures

Male and Femals Sex Cells

Karyotypes (video)

Human Genetic Traits (video)

Sex Linked Traits Genes are found only on the X chromosomes Disorders ( that we will discuss ) – Color blind – Hemophilia XY = Male XX = Female

Color Blind Gene represented by a superscript C Only found on the X chromosome Can not distinguish reds and greens. The colors appear brown. 1:12 males 8% of U.S. population 1:200 females.5% of U.S. population hemophiliaeurope.html

Color blind (video)

Possibilities Male – XY normal sight – X C Y colorblind Female – XX normal sight – X C X or XX C trait carrier – X C X C colorblind

Stoplights

Colorblind Eye Charts

Statistics for Colorblindness The color blindness test consists of a set of five charts. Each chart shows a number in one color on a different background color. People with normal color vision will have no problem seeing the numbers on the charts, but people with color blindness will see only random colored dots. Seventy-five percent of color blind people have poor green perception. Of the remaining, 24% have poor red perception, and one percent are affected by a rare tritan type.

Hemophilia Blood does not clot Represented by a H superscript on the chromosome hemophiliaeurope.html

Possibilities Male – XY normal blood – X H Y Hemophilia Female – XX normal blood – X H X or XX H trait carrier – X H X H Hemophilia

Royal Family Pedigree

The European Royal Family hemophiliaeurope.html

Hemophilia (video)