Question 15 of 40 why did mendels work go unnoticed a

Question 15 of 40
Why did Mendel’s work go unnoticed?
A. The scientific community believed new traits develop through mutation
B. The scientific community believed new traits developed through blending of traits from parents.
C. The scientific community believed dominant traits would always mask recessive traits
D. The scientific community believed that physical characteristics were dependent on many genes interacting.
E. The scientific community believed that traits are inherited in distinct groups.
Feedback: Learning Objective: Describe the scientific reasons for the success of Mendel’s experimental work
Question 16 of 40
An experiment started with
15
N
15
N DNA. After two generations in
14
N medium, E. coli will have
N
N
14
N
N
Feedback: Correct
Question 17 of 40
Why do so many geneticists focus on studying yeast, fruit flies, nematodes, mice or the small plant
Arabidopsis?

2.5/ 2.5 Points
C.
They have multiple features that allow for cheap, fast and efficient manipulation of genes and chromosomes.
D. They are some of the few organisms in which mutations can be generated.
Feedback: Genetic model organisms have a quick lifecycle, small size, and resilience that makes them easy to
culture in the lab.
Question 18 of 40
The codon AUG specifies the amino acid methionine. What would the tRNA anitcodon be that
recognizes this codon?
2.5/ 2.5 Points
Feedback: Correct
Question 19 of 40
Your labmate’s ligation reaction didn’t work. The regular ATP had run out, so he fueled the reaction
with dATP from the PCR kit. What advice can you give him?
A. Suggest trying one of the other nucleotides from the PCR kit to drive the ligation reaction.
B. Suggest adding all four nucleotides from the PCR kit.
C. Add heat to the ligation reactions to provide energy, instead of ATP.
D. Remind Sam that dATP is not the same as ATP.
Feedback: For synthesizing DNA in PCR, nucleotides may be provided in separate tubes of dATP, dCTP, dGTP,
and dTTP. Because these are deoxyribonucleotides, they do not have the same structure as ATP, and therefore
cannot be used as energy currency molecules to drive a ligation reaction.
2.5/ 2.5 Points