Transcript This is Gladys… aw, Gladys.

This is Gladys… awww, Gladys.
Here are some of her siblings!
Lil’ Darling
Jethro
Hoss
Larry
So what makes them so
CUTE!?!?
Their PARENTS of COURSE!!!
Meet Dad, Rowdy…
Haircut?
…and Mom Sassy!!!
Slobber much?
Is it what you expected? Why not?
=
Family Tree: Gladys the
Golden-doodle
F2 generation
Gladys
Larry
Lil Dumping
Sassy
Golden
retriever
(F)
Poodle
(M)
Hoss
Rowdy
Golden
retriever
(F)
Jethro
F1 generation
Poodle
(M)
P1
Traits:
Traits = different physical characteristics
Heredity
Heredity = the passing of traits from parent to offspring
=
Genetics = the study of heredity
Mendel guy sure
loved his peas…
•Easy to study
• a lot of offspring
• looked at 7 traits
Give me an ALLELE!
Genes = the factors that control traits
Allele = different forms of a gene
MALE
FEMALE
OFFSPRING
Part 1: Practice Problems
Have your book open to page 83 Figure 3!!!
Are the following alleles DOMINANT or recessive
1. Round seed
DOMINANT!
2. Wrinkled seed
recessive…
3. Green seed
DOMINANT!
4. Tall plant
DOMINANT!
5. Short plant
recessive…
Part 2: Labeling alleles
Scientists LOVE to use abbreviations!!! They will
represent the allele with a letter. Uppercase for
DOMINANT and lowercase for recessive.
Example: Round seed = R and wrinkled seed = r
** always create a key and make sure to use
letters that look different as lowercase
Key to alleles:
Trait
Round seed
Wrinkled seed
Yellow seed
Green seed
Allele
R
r
Y
Tall
Short
T
t
y
Part 3:What will it look like?
DOMINANT + DOMINANT = DOMINANT
DOMINANT + recessive =
DOMINANT
recessive + DOMINANT =
DOMINANT
recessive + recessive =
recessive
Try it now!
Allel What will it
es look like?
1.RR
2.Rr
3.rr
4.Yy
5.YY
6.yy
7.Tt
8.tt
Trait
Allele
Round seed
R
Wrinkled
seed
r
Yellow seed
Y
Green seed
y
Tall
T
Short
t
Part 4: Super Challenge!
9. Rr Tt
10. rr YY Tt
Trait
Allele
Round seed
R
Wrinkled
seed
r
Yellow seed
Y
Green seed
y
Tall
T
Short
t