Download Dominant Traits - Stronger Trait Recessive Traits

Dominant Traits - Stronger Trait
The trait that shows up
Shown with a capital letter
Example: Brown Eyes (BB)
or (Bb)
Recessive Traits - Weaker Trait
The Hidden trait
Shown with a lower case letter
Example: Blue Eyes (bbO
Principles Of Genetics
1. Traits are passed from parents to offspring
2. Traits are controlled by genes
3. Inherit genes in pairs - One from each
parent
4. Some genes are Dominant and others
are recessive
5. Dominant genes hide recessive genes
6. Some genes show incomplete dominance
Genetics And Probability
What are the odds of having blue-eyed children?
Great Grandma
Bunny
Bilbo
Betty
Bif
Babs
Buddy
Berta
Great Grandpa
Buffy
Bianca
Becky
Bess
Bubba
Beatrice
Billy
Brooke
Barnie
Basil
Bobby
Beth
Bonnie Blaire Belle
Structure of DNA
1. The Thread of Life
2. In each cell that makes up your body information is stored in the form of DNA
3. Genetic Blueprint that contains all the directions that control your body
4. Looks like a twisted ladder
5. Made up of 3 substances connected in a certain pattern
a. Phosphate
b. Deoxyribose
c. 4 bases - That make up the rungs of the ladder
DNA
One small section of a chromosome is
called a GENE.
Gregor Mendel is known as the "Father of Genetics". He was
the first to study traits and heredity. (He is famous for his Pea
Plant Study.)
7. A change or mistake in the DNA is called a mutation
8. The division of the body cells is called Mitosis
9. Meiosis is the division of the sex cells
Mendel's Pea Plant Study
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Punnett Squares - Show ways that traits can be
combined.
Upper case letters - show dominant traits
lower case letters - show recessive traits
Example:
Brown eye color is dominant to blue eye color
BB - Pure Brown eyes (Purebred)
Bb - Brown eyes (Hybrid)
bb- Pure blue eyes (Purebred)