Human Genetics

Autosomal dominant

Shows up in every generation

The affected either are HH or Hh

Ex. Huntington’s disorder

Autosomal Recessive

Offspring can have the trait when neither parents have it

The affected show hh

Usually appears in later generations'

ex. PKU, Tay-sachs, CF

Sex Linked recessive

Occurs in males more frequent

affected have Xh Xh or XhY

ex. Hemophilia, colorblindness

Sickle Cell Disease

Codominant

Blood cells abnormally shaped

More common in African dissent

Cystic Fibrosis

Recessive disorder

Traced back to Caucasians

PKU

Recessive disorder

The affected must follow a low protien diet

Tay-Sachs

Autosomal recessive

Brain expands and you die before your 5

Jewish are most common

Hemophilia

Sex-Linked recessive

Blood clotting is minimal

Colorblindness

Sex Linked recessive

1/10 males have it

1/100 females have it

Klinefelter syndrome

XXY

Males with feminine characteristics

Turners syndrom

X

Female who is infertile and have underdeveloped secondary sexual characteristics.

Down syndrome

Has an extra 21 st chromosome

Huntingtons disease

Autosomal dominant

No symptoms until 30

Every child of affected parents has a 50% chance of getting it

Brain decays