Genetics

Color Blindness

Occurs more frequently in men

sex-linked (X) affects light

receptors in the eye• red/green• complete

Muscular Dystrophy

Progressive muscle weakness/loss of muscle tissue

Sex - linked X chromosome usually begins in

early childhood

Cystic Fibrosis

Inherit 2 “CF” genes

autosomal disorder

mucus builds up in lungs

1/2500 people in U.S.

Turner Syndrome

A single X chromosome

1/5000 births sex organs do not

mature may be shorter than

average puffy hands/feet neck skin sterile

TURNER’S SYNDROME

Klinefelter Syndrome

XXY 1/2000 births small testes sterile feminine body

characteristics taller than

average

XYY

Down Syndrome

Trisomy 21 broad, flat face upslanted eyes mental retardation 1/700 births in

U.S. The older you are

the greater your risk!

DOWN SYNDROME

Fragile X Syndrome

Abnormal X chromosome

mental retardation

1/2500 males 1/1500 females

PATAU SYNDROME TRISOMY 13

PATAU

Dwarfism

Average size trunk with short arms and legs typical

BALDNESS Sex-Influenced traits. More common in men

than women. Not exactly sure where

this trait resides? Men get it if

homozygous recessive bb or heterozygous Bb! Women only get it if they are homozygous recessive bb.

HUNTINGTON DISEASE

Dominant Trait. Shows up in the thirties

and forties, damage to nervous system begins.

Leads to mental retardation and loss of muscle control

Located on the 4th chromosome

SICKLE CELL ANEMIA

A disorder where the red blood cells are in the shape of a sickle.

Co-dominant disorder heterozygous=carriers Mostly found in people

with african heritage. Reason? Malaria, SCA

is partially resistant.

HEMOPHILIA

Sex-linked disorder Recessive allele bleeder’s disease Clotting factor is

missing. 1:10,000 males 1:100,000,000 females treatment-injecting

clotting factors

SPINA BIFIDA

When vertebrae in your spinal cord fail to develop and leaves a space causing damage to the nervous system

Cri Du Chat

1: 50,000 deletion on chromosome 5 abnormal larynx development cry of the cat Low birth weight Respiratory problems