Download Determining Probability with Punnett Square Problems

Determining Probability with
Punnett Square Problems
Determining Probability with
Punnett Square Problems
Given the following genotypes
what is the likelihood that
A. A homozygous
dominant organism will
pass on a dominant trait?
Given the following genotypes
what is the likelihood that
B. A heterozygous
organism will pass on a
recessive gene?
Given the following genotypes
what is the likelihood that
C. A homozygous
recessive organism will
pass on a recessive gene?
When studying rabbit coat color,
one observes that black (B) is
dominant to Brown (b)
A. What would be the
genotype of a homozygous
black rabbit?
When studying rabbit coat color,
one observes that black (B) is
dominant to Brown (b)
B. What is the phenotype
of a Bb rabbit?
When studying rabbit coat color,
one observes that black (B) is
dominant to Brown (b)
C. What is the phenotype
of a bb rabbit?
When studying rabbit coat color,
one observes that black (B) is
dominant to Brown (b)
D. What would the
genotype of a
heterozygous rabbit?
Free earlobes are dominant (F) to
attached (f).
A man with free earlobes
marries a woman with
attached. Their child has
attached lobes. Create the
Punnett square to show the
genotype
Fun with Punnett Squares
Fun with Punnett Squares
Brown eyes (B) are dominant to
blue (b)
A woman with blue eyes
marries a brown eyed man
whose genotype is
heterozygous. What is the
probability of them having
children with blue eyes?
Fun with Punnett Squares
Fun with Punnett Squares
A normally pigmented man
marries an albino woman.
Albinism is a recessive trait.
They have three children,
one of whom is albino. What
is the genotype of the
parents
Fun with Punnett Squares
Fun with Punnett Squares
A normally pigmented man
marries an albino woman.
Albinism is a recessive trait.
They have three children,
one of whom is albino. What
is the genotype of the
parents
White squash E is dominant over
yellow e
Cross a homozygous white
with a yellow
Fun with Punnett Squares
Fun with Punnett Squares
Fun with Punnett Squares
Fun with Punnett Squares
White squash E is dominant over
yellow e
Cross a homozygous white
with a yellow
Hornless (H) is dominant to the
horned trait (h).
A hornless bull (Hh or HH
is mated to three cows.
Hornless (H) is dominant to the
horned trait (h).
A hornless bull (Hh or HH)
is mated to three cows.
1st is horned.
Calf is hornless
Fun with Punnett Squares
Fun with Punnett Squares
Fun with Punnett Squares
Fun with Punnett Squares
While studying cattle, one
observes the hornless trait (H) is
dominant to horned (h)
Hornless x hornless
Produces a horned calf
Black and white sheep. Black is
recessive to white. Eliminate the
black sheep
Plan
Fun with Punnett Squares