Genetics Exam questions and
answers graded A+
A very slowly growing bacteria divides once every 720 hours.
a. After 1 years, how many times has it divided?
b. Assuming there is no cell death, how many cells are present after 1 year. - ANS✅✅a. 12.2
b. 4,096
A pack of 50 baseball trading cards has 40 veterans and 10 rookie players. In the same deck, there
are 45 right-handers and 5 left-handers.
What is the ratio of veterans to rookie players? - ANS✅✅4: 1
You discover a bacteria living inside cell phones. The frequency of A is .12.
a. What is the frequency of T?
b. What is the A + T content?
c. What is the G + C content?
What is the frequency of G? - ANS✅✅a. 0.12
b. 0.24
c. 0.76
d. 0.38
In organisms with 23 pairs of chromosomes, how many different possibilities are possible after
meiosis? - ANS✅✅8,388,608
Name 6 most common elements. - ANS✅✅C, H, N, O, S, P
What type of molecules always end with suffix -ase? - ANS✅✅enzymes
a. In cell cycle, G1 is followed by S phase, then M, and lastly G2.
b. DNA is replicated during the S phase.
, c. Gametes have 2 copies of each chromosome and are therefore diploid.
d. Gametes formed by mitosis are genetically diverse. - ANS✅✅a. False
b. True
c. False
d. False
Which of the models below that tried to explain inheritance turned out to be wrong? -
ANS✅✅Preformation theory, Pangenesis, and Blending inheritance
Avery and his colleagues expanded Griffith's transforming principle experiment for investigating
genetic material; they suggested DNA but not protein is genetic material. If the hypothesis "Protein
is genetic material" is correct, predicts the outcome of the experiment illustrated on the figure
below. Which of the treatment(s) will cause mice to die?
A. Treatment 1 control
B. Treatment 2 protease
C. Treatment 3 Rnase added
D. Treatment 4 DNase added - ANS✅✅D, A, C
Slide 27 of lecture video 1-1 - ANS✅✅
Slide 6 of lecture video 1-2
Which mutant(s) below have gene mutation related to vitamin B synthesis only? - ANS✅✅wild-
type and mutant B
Slide 11 of lecture video 1-2
According to the information below, which mutant has a mutation on gene 2? - ANS✅✅mutant B
Slide 12 of lecture video 1-2 - ANS✅✅Pathway B supports the data
A DNA phage genome is 50 kb in length. It has 60% GC content. Therefore the phage genome has
____ % A, and ____ % G in its content. - ANS✅✅30 % A and 30% G
answers graded A+
A very slowly growing bacteria divides once every 720 hours.
a. After 1 years, how many times has it divided?
b. Assuming there is no cell death, how many cells are present after 1 year. - ANS✅✅a. 12.2
b. 4,096
A pack of 50 baseball trading cards has 40 veterans and 10 rookie players. In the same deck, there
are 45 right-handers and 5 left-handers.
What is the ratio of veterans to rookie players? - ANS✅✅4: 1
You discover a bacteria living inside cell phones. The frequency of A is .12.
a. What is the frequency of T?
b. What is the A + T content?
c. What is the G + C content?
What is the frequency of G? - ANS✅✅a. 0.12
b. 0.24
c. 0.76
d. 0.38
In organisms with 23 pairs of chromosomes, how many different possibilities are possible after
meiosis? - ANS✅✅8,388,608
Name 6 most common elements. - ANS✅✅C, H, N, O, S, P
What type of molecules always end with suffix -ase? - ANS✅✅enzymes
a. In cell cycle, G1 is followed by S phase, then M, and lastly G2.
b. DNA is replicated during the S phase.
, c. Gametes have 2 copies of each chromosome and are therefore diploid.
d. Gametes formed by mitosis are genetically diverse. - ANS✅✅a. False
b. True
c. False
d. False
Which of the models below that tried to explain inheritance turned out to be wrong? -
ANS✅✅Preformation theory, Pangenesis, and Blending inheritance
Avery and his colleagues expanded Griffith's transforming principle experiment for investigating
genetic material; they suggested DNA but not protein is genetic material. If the hypothesis "Protein
is genetic material" is correct, predicts the outcome of the experiment illustrated on the figure
below. Which of the treatment(s) will cause mice to die?
A. Treatment 1 control
B. Treatment 2 protease
C. Treatment 3 Rnase added
D. Treatment 4 DNase added - ANS✅✅D, A, C
Slide 27 of lecture video 1-1 - ANS✅✅
Slide 6 of lecture video 1-2
Which mutant(s) below have gene mutation related to vitamin B synthesis only? - ANS✅✅wild-
type and mutant B
Slide 11 of lecture video 1-2
According to the information below, which mutant has a mutation on gene 2? - ANS✅✅mutant B
Slide 12 of lecture video 1-2 - ANS✅✅Pathway B supports the data
A DNA phage genome is 50 kb in length. It has 60% GC content. Therefore the phage genome has
____ % A, and ____ % G in its content. - ANS✅✅30 % A and 30% G
