1. A picture of chromosomes in ordered pairs
Karyotype
A picture of chromosomes in ordered pairs

2. Humans have 46 chromosomes. They have 23 pairs of chromosomes.
Karyotype
Humans have 46 chromosomes.
They have 23 pairs of chromosomes.

3. Two chromosomes that determine an individual’s sex.
Sex Chromosomes
Two chromosomes that determine an individual’s sex.

4. Two X Chromosomes: Female X and Y Chromosomes: Male
Sex Chromosomes
Two X Chromosomes: Female
X and Y Chromosomes: Male

5. Sex Chromosomes Egg cells: single X chromosome
Sperm cells: half X and half Y chromosomes

6. Remaining chromosomes of an individual
Autosomes
Remaining chromosomes of an individual

7. Located on Chromosomes
Genes
Located on Chromosomes

8. Multiple genes used to determine blood type
Blood Type Genes
Multiple genes used to determine blood type

9. Rh stands for “rhesus monkey” Dominant: Rh+ Recessive: Rh-
Rh blood group
Rh stands for “rhesus monkey”
Dominant: Rh+
Recessive: Rh-

10. ABO Blood Group ABO alleles produce specific antigens
Antigens: trigger an immune response

11. Blood Group Genes
Both ABO and Rh groups are mentioned at the same time
Ex. AB- means AB blood type and Rh-

12. Takes two alleles to be expressed
Recessive Alleles
Takes two alleles to be expressed

13. Recessive Allele Disorders
PKU
Tay-Sachs disease

14. Only takes one allele to be expressed
Dominant Allele
Only takes one allele to be expressed

15. Dominant Allele Disorders
Huntington’s disease
Achondroplasia (Dwarfism)

16. Both alleles contribute to physical expression
Codominant Alleles
Both alleles contribute to physical expression

17. Codominant Allele Disorder
Sickle Cell disease