Transcript Mendelian Inheritance

Chapter 7: Mendelian Inheritance
Clicker Questions
by Kristen Curran, University of Wisconsin-Whitewater
Mendel figured out the rules of genetics by
working with pea plants. Why were these
plants a good tool for Mendel to use to
answer his questions about inheritance?
1. Individual plants could be self-fertilized or
cross-fertilized with other individuals.
2. They grew quickly (short generation time).
3. Clearly defined traits (yellow vs. green) were
observed.
4. All of the above.
Which example is the genotype
of a true-breeding plant?
1. Two copies of the purple allele
2. Two copies of the white allele
3. One copy of the purple and one copy
of the white allele.
4. 1 and 2
5. All of the above
Which answer below is an
example of a heterozygous
plant?
1. Two copies of the purple allele
2. Two copies of the white allele
3. One copy of the purple allele and one
copy of the white allele
4. 1 and 2
5. All of the above
A flower that is heterozygous for the purple
gene (Purple “P” is dominant over white “p”)
has what phenotype and genotype,
respectively?
1.
2.
3.
4.
5.
Purple; PP
Purple; pp
White; Pp
White; pp
Purple; Pp
If an albino woman marries a man that is
heterozygous for albinism, what is the
probability that they will have an albino
child?
1.
2.
3.
4.
5.
0%
25%
50%
75%
100%
Classroom Catalyst
Human Genetics
If you are unable to roll your
tongue, what is your genotype?
1.
2.
3.
4.
RR
Rr
rr
1 or 2
If you have free earlobes, what
is your genotype?
1.
2.
3.
4.
EE
Ee
ee
1 or 2
You mate a pigmented male alligator to a
female albino alligator. The clutch of baby
alligators includes both pigmented and
albino individuals. What is the genotype of
the father?
1.
2.
3.
4.
MM
Mm
mm
1 and 2 are equally possible.
What is the genotype of the
paternal grandmother?
1. Homozygous
recessive
2. Heterozygous
3. Homozygous
dominant
4. Cannot be
determined
What is the probability that you
(“Me” in the diagram) will be a
carrier for this disease?
1.
2.
3.
4.
1.
1/4
1/3
1/2
2/3
3/4
The gene for aldehyde dehydrogenase (ADH)
is incompletely dominant. A woman who is
heterozygous for this gene (ADH+/ADH)
marries a man who is homozygous for the
normal allele (ADH+/ ADH+). What is the
probability that they will have heterozygous
children?
1.
2.
3.
4.
1/4
1/2
3/4
2/3
An individual with type O blood marries an
individual with type AB blood. Which of the
following would not be a possible offspring
blood type?
1.
2.
3.
4.
A
B
O
All of the above are
possible.
If a male is colorblind, from
whom did he inherit the
condition?
1.
2.
3.
4.
Mother
Father
Grandfather
Aunt
In which example below will there
be a chance of a daughter being
colorblind?
1. A male who is colorblind marries a female
who is a carrier for colorblindness.
2. A male who has normal vision marries a
female who is a carrier for colorblindness.
3. A male who has normal vision marries a
female who is colorblind.
4. Choices 2 and 3 are correct.
In which example below does
independent assortment not occur?
1. True-breeding red snap dragons crossed with
true-breeding white snap dragons yield 100%
pink offspring.
2. Two plants that are heterozygous for the purple
flower color allele yield offspring in the ratio of
approximately 3:1 (Purple: white).
3. A male who has normal vision marries a
woman who is a carrier for colorblindness.
They have a son who is colorblind.
4. Two genes are found in close proximity to each
other on the same chromosome.