2/20/14
106th Day of School
Learning goal (7.L.2.2): I will be able to describe and
identify genetic traits and predict heredity using
Punnett squares and probability tables.
Due Today: Punnett square problems/Late work
Evening Assignment: Study for Quiz on Traits and
Punnett Squares
Hawley Hornets Team
Dr. Batten
Shon B.
Justice N.
Logan Jacobi
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• Use the white boards to
answer the quiz review
questions.
• Do not hold up your board
until directed to do so.
Quiz Review
A characteristic that an
organism can pass on to
its offspring through its
genes or can be
developed or learned.
Quiz Review
A characteristic that an
organism can pass on to its
offspring through its genes
or can be developed or
learned.
Trait
Quiz Review
A trait which is
developed or learned
during your life.
Quiz Review
A trait which is
developed or learned
during your life.
Acquired trait
Quiz Review
A trait which you are
born with.
Quiz Review
A trait which you are
born with.
Inherited trait
Quiz Review
Blue eyes is an
example of a(an)…
Quiz Review
Blue eyes is an
example of a(an)…
Inherited trait
Recessive trait
Quiz Review
1. Draw a Punnett square.
2. Then label where the male
and female genotypes are
written
Quiz Review
Draw a Punnett square.
Then label where the male and
female genotypes are written.
Female
Male genotype
Quiz Review
In pea plants, green pod color (G) is dominant over
yellow pod color (g). Create a Punnett square of a
cross between a hybrid male plant with green pods
(Gg) and a female plant with yellow pods (gg).
Quiz Review
In pea plants, green pod color (G) is dominant over
yellow pod color (g). Create a Punnett square of a
cross between a hybrid male plant with green pods
(Gg) and a female plant with yellow pods (gg).
G
g
g
Gg
gg
g
Gg
gg
Quiz Review
In pea plants, yellow seed color (Y) is dominant
over green seed peas (y). Create a Punnett square
of a cross between a male and female plant both
heterozygous for yellow seed color (Yy).
Quiz Review
In pea plants, yellow seed color (Y) is dominant
over green seed peas (y). Create a Punnett square
of a cross between a male and female plant both
heterozygous for yellow seed color (Yy).
Y
y
Y
YY
Yy
y
Yy
yy
Quiz Review
What is the probability that the offspring of this
cross will be Yy?
Y
y
Y
YY
Yy
y
Yy
yy
Quiz Review
What is the probability that the offspring of this
cross will be Yy?
2:4 or 50%
Y
y
Y
YY
Yy
y
Yy
yy
Quiz Review
What is the probability that the offspring of this
cross will have green seeds?
Y
y
Y
YY
Yy
y
Yy
yy
Quiz Review
What is the probability that the offspring of this
cross will have green seeds?
yy -> 1:4 or 25%
Y
y
Y
YY
Yy
y
Yy
yy
Quiz Review
In pea plants, round peas (R) are dominant over
wrinkled peas (r). Create a Punnett square of a
cross between a female male plant homozygous for
round peas (RR) and a male plant homozygous for
wrinkled peas (rr).
Quiz Review
In pea plants, round peas (R) are dominant over
wrinkled peas (r). Create a Punnett square of a
cross between a female plant homozygous for
round peas (RR) and a male plant homozygous for
wrinkled peas (rr).
r
r
R
Rr
Rr
R
Rr
Rr
Quiz Review
What is the probability that the offspring of this
cross will be Rr?
r
r
R
Rr
Rr
R
Rr
Rr
Quiz Review
What is the probability that the offspring of this
cross will be Rr?
4:4 or 100%
R
R
r
Rr
Rr
r
Rr
Rr
Quiz Review
In humans, brown eyes (B) are dominant over blue
(b). A brown-eyed man marries a blue-eyed woman
and they have three children, two of whom are
brown-eyed and one of whom is blue-eyed. Use
the correct Punnett square to show the genotypes
of the parents and the children.
Quiz Review
In humans, brown eyes (B) are dominant over blue
(b). A brown-eyed man marries a blue-eyed woman
and they have three children, two of whom are
brown-eyed and one of whom is blue-eyed. Use
the correct Punnett square to show the genotypes
of the parents and the children.
B
b
Bb
b
Bb
Quiz Review
b
bb
The different forms of a
gene.
Quiz Review
The different forms of a
gene.
Allele
Quiz Review
The Father of Genetics
Quiz Review
The Father of Genetics
Gregor Mendel
Quiz Review
Having two identical alleles
for a trait.
Quiz Review
Having two identical alleles
for a trait.
Homozygous
(Purebred)
Quiz Review
Give an example of a
homozygous dominant
genotype.
Quiz Review
Give an example of a
homozygous dominant
genotype.
GG, NN, TT, YY
Quiz Review
An organism’s physical
appearance, or visible
traits. “What you see”
Quiz Review
An organism’s physical
appearance, or visible
traits.
Phenotype
Quiz Review
An allele whose trait shows
up in the organism with
only one copy.
Quiz Review
An allele whose trait shows
up in the organism with
only one copy.
Dominant
Quiz Review
Having two different alleles
for a trait.
Quiz Review
Having two different alleles
for a trait.
Heterozygous
(Hybrid)
Quiz Review
Give an example of a
heterozygous genotype.
Quiz Review
Give an example of a
heterozygous genotype.
Gg, Dd, Yy
Quiz Review
An allele whose trait shows
up in the organism only
when two identical copies
of the allele are present.
Quiz Review
An allele whose trait shows
up in the organism only when
two identical copies of the
allele are present.
Recessive
Quiz Review
An organism’s genetic
makeup. “The genes it
has”
Quiz Review
An organism’s genetic
makeup. “The genes it
has”
Genotype
Quiz Review
A pet store owner has three guinea pigs:
1. Purebred Black
2. Hybrid Black
3. purebred brown
If the store owner wants to get more brown guinea
pigs, which two should he breed?
What is the probability of getting a brown guinea
pig from this cross?
Exit Ticket – on white board
Tonight…
1. Finish flashcards
2. Study for quiz
- traits
- Mendel
- Punnett squares
Quiz is tomorrow!
Evening Assignment