HOMEWORK:
Write questions and summaries on each page of your notes.
Tour of Basic Genetics
Tour of Basic Genetics
http://learn.genetics.utah.edu/content/basics/
DNA LAB
http://learn.genetics.utah.edu/content/labs/extraction/
Build Your DNA
http://learn.genetics.utah.edu/content/molecules/builddna/
Molecules of Inheritance:
http://learn.genetics.utah.edu/content/molecules/
Biology Genetics Additional Notes
Ferrell
Characteristics: Is
the category of a trait
Ex. eye
color, height, likes, dislikes
Traits: the
physical social, and emotional qualities of an organism
Ex. blue eyes, tall, hates carrots
Dominant
Trait: when a majority of an organism shows the trait
Ex. mos pea plants show as tall
Recessive
Trait: When a minority of an organism shows the trait
Ex. Few pea plants show as short
Alleles: all
the possible choices for a characteristic (A single gene)
Ex. Eye color, blue, brown, gray, green
GENOTYPE: allele
pair (TT, Tt, tt) GENE CODE… think letters
· How the
genes code for a specific trait
· If the
trait is DOMINANT it uses a CAPITAL LETTER (Control)
o EXAMPLE:
Tall (T)
· If the
trait is RECESSIVE it uses the same letter but lower case
(Weak)
o EXAMPLE:
short (t)
· Genotypes
always have two letters
o One from
day and one from mom
THREE
TYPES OF GENOTYPES
· Purebred
(homozygous) dominant: TT (Capital, Captial)
o Has two
dominant traits
o EX.
Dominant Tall (TT)
· Purebred
(homozygous recessive: tt (lower case, lower case)
o Two
recessive genes together
o EX
Recessive short (tt)
· Hybrid
(heterozygous) Tt (Captial and lower case)
o Genes are
mixed
o EX hybrid
tall (Tt)
PHENOTYPE: Physical
Characteristics (What you can see)
· The
outward appearance
· How an
organism looks, acts, and feels
· Deals
with looks you can take a photo with
HEREDITY: The
passing of traits from one generation to another
Gregor
Mendel: The father of genetics
THREE
GENERATIONS of INHERITANCE
1. P
Generations The Parental Generations: (Grandparents)
2. F-1 First
Filal (Parents)
3. F-2
Second Filal (You)
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