Download Quiz #7

MIRA COSTA COLLEGE
LIFE SCIENCES DEPARTMENT
General Biology Lecture (BIO101)
Instructor: Elmar Schmid, Ph.D.
QUIZ #7
Genetics
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Answer the following questions of this ‘open book, open notes and free access instructor
website’ quiz and mark it on a Scantron 882-E answer sheet.
All questions must be answered by the student without help by class mates, friends or other
human beings. Please read the following statement below carefully and sign it if you satisfy
the guidelines outlined in this statement. This signed take home exercise sheet must be
turned in with your answer sheet to receive full credit for this assignment. This assignment is
due at the first class meeting the following week.
I HAVE ANSWERED THE QUESTIONS IN THIS EXERCISE ON MY OWN. I DID NOT CONSULT OTHERS OR
IN ANY CONDUCT IN ANY ACTIVITITES THAT COULD BE CONSTRUED AS CHEATING IN THIS
ASSIGNMENT. I DID NOT MAKE ANY COPIES OF THIS ASSIGNMENT.
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(PRINT YOUR NAME)
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Q. 1: A dihybrid cross in plant genetics means
A) the second generation of a self-fertilized plant
B) a breeding experiment in which parental varieties have two traits in common
C) a breeding experiment in which the parental varieties phenotypically differ in two traits
D) a breeding experiment between a dihybrid and a true-inbred individual
E) none of the above
Q. 2: Research since G. Mendel’s time has established that the principle of the segregation of genes
(alleles) during gamete formation applies to all forms of life.
A) True
B) False
Q. 3: A farmer crosses a corn plant with solely purple kernels with a true-bred yellow corn variety
and observed that all of the kernels of the following corn generation are purple. He concludes, that
the corn plant with the purple kernels
A) was homozygous dominant regarding the purple kernel allele P
B) was heterozygous (genotype Pp)
C) was homozygous regarding the yellow kernel allele p
D) the new plant generations showed typical blending of traits
Q. 4: A healthy woman whose brother died from sickle cell anemia in younger years marries a man
heterozygous regarding the sickle cell anemia allele. What is the chance for this couple that they
will have a child that will be diagnosed with sickle cell anemia?
A) 100%
B) 50%
C) 25%
D) not possible (0%)
Q. 5: A red-colored snap dragon plant is crossed with a (regarding petal color) heterozygous snap
dragon plant. What percentage of the snap dragon offspring will have white blossom color?
A) 100%
B) 75%
C) 50%
D) 25%
E) 0%
Q. 6: The phenotype (petal color) of the heterozygous snap dragon plant in question 5 is?
A) white
B) red
C) pink
MIRA COSTA COLLEGE
LIFE SCIENCES DEPARTMENT
General Biology Lecture (BIO101)
Instructor: Elmar Schmid, Ph.D.
Q. 7: Which of the following is an example of incomplete dominance in humans
A) sickle-cell disease
B) familial hypercholesterolemia
C) red-green color blindness
D) albinism
E) achondroplasia
Q. 8: What is the normal complement of sex chromosomes in somatic cell of a human female?
A) two X chromosomes
B) two Y chromosomes
C) two X chromosomes and one Y chromosome
D) one X chromosome and one Y chromosome
E) one X chromosome
Q. 9: Hemophilia is an X-linked human blood coagulation disorder in humans. After knowing the
genotype of different members of a family, which of the following family members would develop
the clinical picture? (alleles: XN = normal; XM = mutation)
A) brother M. (genotype: XM,Y)
B) sister F. (genotype: XN, XM)
C) half sister G. (genotype: XN, XN)
D) grand mother S. (genotype: XM , XM )
E) both, a and d
Q. 10: A woman who’s father died from Duchenne-type muscular dystrophy marries a healthy and
athletic man. What is the chance for this couple that the woman gives birth to a daughter being
diagnosed with muscular dystrophy?
A) 100%
B) 50%
C) 25%
D) no chance
Q. 11: What would be the blood types of children from a mating between a woman with blood type
A whose father had blood type AB and a man with blood type O?
A) all AB
B) all O
C) all A
D) A and AB E) A and O
Q. 13: A cattle with the genotype AaBBCC for three heritable traits “A”, “B” and “C” is mated
with a cattle with the genotype aaBbCc. What is the probability p for this cattle pair to have
offspring with the genotype aaBBCC?
A) 0
B) 0.125
C) 0.25
D) 0.5
E) 0.75
Q. 14: In a cross between a pure bred, red-eyed female fruit fly and a white-eyed male, what
percent of the male offspring will have white eyes? Use (as usual) a Punnett square to predict and to
visualize the outcome.
A) 100%
B) 75%
C) 50%
D) 25%
E) 0% (none)
Bonus Q.: A yellow wrinkled seed bearing pea plant – homozygous regarding the yellow seed color
allele - is crossed with a green smooth seed pea variety with the genotype yySs. What percentage of
the offspring of this pea couple will have yellow smooth seeds? Hint: Dihybrid cross experiment.
A) all (100%)
B) 75%
C) 50%
D) 25%
E) none (0%)