Mutation (2)

Example of chromosome mutation (2)

Turner syndrome

Example of chromosome mutation (3)

Klinefelter syndrome

Example of gene mutation (2)

Sickle cell anemia

Example of gene mutation (3)

Thalassemia

Example of gene mutation (4)

Hemophilia

Example of gene mutation (5)

Albinism

Causes of Down syndrome

Occurs because there is an extra chromosome in chromosome number 21

The number of chromosomes in normal individual

46 chromosomes

The number of chromosomes in person with Down Sydrome

47 chromosomes

Characteristics of individuals with Down syndrome (1)

Physical and mental retardation