Sex Linked Traits. Karyotype pictures Male and Femals Sex Cells.
-
Upload
gerald-mitchell -
Category
Documents
-
view
242 -
download
9
Transcript of Sex Linked Traits. Karyotype pictures Male and Femals Sex Cells.
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 = MaleXX = 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
www.ikm.jmu.edu/.../ hemophiliaeurope.html
Color blind (video)
Possibilities
Male– XY normal sight
– XCY colorblind
Female– XX normal sight
– XCX or XXC trait carrier
– XCXC 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
www.ikm.jmu.edu/.../ hemophiliaeurope.html
Possibilities
Male– XY normal blood
– XHY Hemophilia
Female– XX normal blood
– XHX or XXH trait carrier
– XHXH Hemophilia
Royal Family Pedigree
The European Royal Family
www.ikm.jmu.edu/.../ hemophiliaeurope.html
Hemophilia (video)