PCB 3063 FINAL EXAM 2024/2025
PCB 3063 FINAL EXAM 2024/2025
QUESTIONS AND ANSWERS GRADED A+
SOLVED
Which of the following events of meiosis creates genetic variation among the
gametes?
A. Crossing over
B. Independent assortment of maternal and paternal chromosomes
C. Separation of homologues so each gamete only gets one copy of each
chromosome
D. A and B
E. All of the above
E. All of the above
Tall (T) is a dominant trait in corn plants over dwarf (t). A tall plant is test-crossed,
and half of the offspring produced are tall and half are dwarf. What are the
genotypes of the individuals that were crossed if the mating followed exactly what
was predicted?
A. TT x tt
,PCB 3063 FINAL EXAM 2024/2025
B. Tt x tt
C. Tt x Tt
D. TT x Tt
B. Tt x tt
For the recessive X-linked eye color gene in fruit flies, Morgan crossed a
homozygous red eyed female with a white eyed male. Which result made Morgan
think that the locus affecting eye color was on the X chromosome?
A. All F1 male and female flies had red eyes.
B. All F1 male and female flies had white eyes.
C. In the F2, all females had red eyes, and half of the males had red eyes and the
other half had white eyes.
D. In the F2, half of males and females had red eyes and the other half had white
eyes.
C. In the F2, all females had red eyes, and half of the males had red eyes and the
other half had white eyes.
A child who is blood type A has a mother who is blood type B. In a paternity suit,
a man is accused of being the father. He has blood type AB. Is he the father?
, PCB 3063 FINAL EXAM 2024/2025
A. Yes for sure
B. No for sure
C. He can not be excluded at this point.
D. There is a 50% chance he is the father.
C. He can not be excluded at this point.
If the mom is IBi, he could be the father.
What characteristic would you NOT expect to see in a pedigree of an X-linked
recessive trait?
A. The trait is more commonly seen in males.
B. The trait can skip a generation.
C. The trait is commonly passed from fathers to sons.
D. Whenever a daughter receives the trait, the father is affected.
E. An affected son's mother either has the trait or is heterozygous (carrier).
C. The trait is commonly passed from fathers to sons.
PCB 3063 FINAL EXAM 2024/2025
QUESTIONS AND ANSWERS GRADED A+
SOLVED
Which of the following events of meiosis creates genetic variation among the
gametes?
A. Crossing over
B. Independent assortment of maternal and paternal chromosomes
C. Separation of homologues so each gamete only gets one copy of each
chromosome
D. A and B
E. All of the above
E. All of the above
Tall (T) is a dominant trait in corn plants over dwarf (t). A tall plant is test-crossed,
and half of the offspring produced are tall and half are dwarf. What are the
genotypes of the individuals that were crossed if the mating followed exactly what
was predicted?
A. TT x tt
,PCB 3063 FINAL EXAM 2024/2025
B. Tt x tt
C. Tt x Tt
D. TT x Tt
B. Tt x tt
For the recessive X-linked eye color gene in fruit flies, Morgan crossed a
homozygous red eyed female with a white eyed male. Which result made Morgan
think that the locus affecting eye color was on the X chromosome?
A. All F1 male and female flies had red eyes.
B. All F1 male and female flies had white eyes.
C. In the F2, all females had red eyes, and half of the males had red eyes and the
other half had white eyes.
D. In the F2, half of males and females had red eyes and the other half had white
eyes.
C. In the F2, all females had red eyes, and half of the males had red eyes and the
other half had white eyes.
A child who is blood type A has a mother who is blood type B. In a paternity suit,
a man is accused of being the father. He has blood type AB. Is he the father?
, PCB 3063 FINAL EXAM 2024/2025
A. Yes for sure
B. No for sure
C. He can not be excluded at this point.
D. There is a 50% chance he is the father.
C. He can not be excluded at this point.
If the mom is IBi, he could be the father.
What characteristic would you NOT expect to see in a pedigree of an X-linked
recessive trait?
A. The trait is more commonly seen in males.
B. The trait can skip a generation.
C. The trait is commonly passed from fathers to sons.
D. Whenever a daughter receives the trait, the father is affected.
E. An affected son's mother either has the trait or is heterozygous (carrier).
C. The trait is commonly passed from fathers to sons.
