1. INHERITANCE PATTERNS Complete Dominance Codominance
Incomplete dominance
Multiple Alleles
Polygenic
Environmental Conditions

2. X-linked traits – traits located on the X chromosome
Sex-influenced traits – the presence of male or female hormones influences the expression of certain traits. Ex. baldness

3. GENETIC SCREENING TESTS
- examination of a person’s genetic makeup
Amniocentesis – b/t 14th and 16th week
Chorionic villi sampling (CVS) – b/t 8th and 10th week

5. Genetic marker – a short section of DNA that is known to have a close association with a particular gene nearby.

7. MULTIPLE ALLELES TRAIT
= trait controlled by genes that have more than 2 alleles
Any combo of 2 alleles produces different phenotypes
Ex. Blood types
4 blood types – A, B, AB, O
AB+ – universal acceptor
O- - universal donor

8. 3 alleles – IA , IB , Ii

9. 3 alleles – IA , IB , Ii
Genotype
Phenotype
IAIA or IAIi
Type

10. 3 alleles – IA , IB , Ii
Genotype
Phenotype
IAIA or IAIi
Type
IBIB or IBIi

11. 3 alleles – IA , IB , Ii
Genotype
Phenotype
IAIA or IAIi
Type
IBIB or IBIi
IAIB

12. 3 alleles – IA , IB , Ii
Genotype
Phenotype
IAIA or IAIi
Type
IBIB or IBIi
IAIB
Type O

13. 3 alleles – IA , IB , Ii
Genotype
Phenotype
IAIA or IAIi
Type A
IBIB or IBIi
Type B
IAIB
Type AB
IiIi
Type O

14. Ex. If mom has IAIi and dad has IAIB, what are the chances of having a child with type B blood?