1. Genetics
Or…..Who’s Yo Daddy?!?

2. Heredity- passing of characteristics ( traits) from parent to offspring.
Traits- examples: shape of nose, size of lips, dimples
Traits- passed on in packets of DNA called genes.

3. Genes All genes are not created equal!!
Stronger genes for the same trait are called “dominant”
Weaker genes for the same trait are called “recessive”
Abbreviate capital letter for dominant, lower case for recessive. Example.

4. What you see is what you got?!?
What you have inside your chromosomes is your “genotype” Example: DD or 2 dimple genes
The expression of your DNA (what you see) is called your “phenotype” Example: Actual Dimples.

5. Blending
Not all traits are dominant/ recessive, some “blend” both genes. Example: size of eyes- large and small make medium sized.

6. Blood Typing Co-dominance
3 different alleles: A, B, O
Create 4 different blood types: A, AB, B, O
Type O is recessive
Each parent “donates” one blood type allele to offspring
Create antigens on each red blood cell – how your body knows it’s your blood

7. Which alleles are there?
Blood type A, could be: _____ or _____
Blood type B, could be ______ or _____
Blood type AB: ______
Blood type O: _______

8. Blood Typing Rh factor – Rhesus (monkey) factor
Rh+ dominant, Rh- recessive
Each parent donates one to offspring, either + or -

9. Universal donor: type O
No antigens present
Universal recipient: AB+
Already has antigens for both, will not create antibodies and fight off any type

10. Sex Chromosomes What makes you male or female?
Females have 2 X chromosomes- XX
Males have 1X and 1 Y XY.
X chromosome is larger, more genes on it

11. What can mom pass on?
What can dad pass on?
So who determines the sex of the baby?

12. Karyotype

13. Allelle

14. Writing prompt
DNA tests have proven that “John Doe” is the father of a child that looks nothing like him or his other 2 children. Using terms learned in class, write a paragraph explaining how this is possible.