Download Karyotype

Karyotype
A picture of chromosomes in
ordered pairs
Karyotype
Humans have 46 chromosomes.
They have 23 pairs of
chromosomes.
Sex Chromosomes
Two chromosomes that determine
an individual’s sex.
Sex Chromosomes
Two X Chromosomes: Female
X and Y Chromosomes: Male
Sex Chromosomes
Egg cells: single X chromosome
Sperm cells: half X and half Y
chromosomes
Autosomes
Remaining chromosomes of an
individual
Genes
Located on Chromosomes
Blood Type Genes
Multiple genes used to determine
blood type
Rh blood group
Rh stands for “rhesus monkey”
Dominant: Rh+
Recessive: Rh-
ABO Blood Group
ABO alleles produce specific
antigens
Antigens: trigger an immune
response
Blood Group Genes
Both ABO and Rh groups are
mentioned at the same time
Ex. AB- means AB blood type and
Rh-
Recessive Alleles
Takes two alleles to be expressed
Recessive Allele Disorders
PKU
Tay-Sachs disease
Dominant Allele
Only takes one allele to be
expressed
Dominant Allele Disorders
Huntington’s disease
Achondroplasia (Dwarfism)
Codominant Alleles
Both alleles contribute to physical
expression
Codominant Allele Disorder
Sickle Cell disease