UConn Biology 1108 Lecture Exam 1
Questions With Answers
A scientific theory: - CORRECT ANSWER✔✔-- Is built using inductive
| | | | | | | | | |
logic
- Is 'unprovable but falsifiable'
| | | |
- Describes a lot with just a little (a model of few parts) - Makes
| | | | | | | | | | | | | | |
predictions about future observations | | |
- Scientific Method (Lab this week!)
| | | | |
Genetic variation: - CORRECT ANSWER✔✔-differences in DNA
| | | | | | |
sequences
What can cause genetic variation? - CORRECT ANSWER✔✔-A
| | | | | | | |
mutation...
- Somatic - Germ-line
| | |
and they can be:
| | |
- Deleterious
|
- Neutral
|
- Advantageous
|
,then recombination gives new combinations not present in parent
| | | | | | | | |
population
Allele Frequencies - CORRECT ANSWER✔✔-Allele Frequency = # of
| | | | | | | | |
copies of an allele/ total # of alleles in population
| | | | | | | | |
Example : A population of 100 pea plants has the following genotype
| | | | | | | | | | | |
frequencies:
50% aa, 25% Aa, 25% AA
| | | | |
What is the frequency of a? - CORRECT ANSWER✔✔-• 100 a copies for
| | | | | | | | | | | | |
the aa group
| | |
• 25 a copies for the Aa group
| | | | | | | |
• 0 a copies in the AA group
| | | | | | |
• Total 125 copies of a out of 200 total alleles
| | | | | | | | | |
• Frequency of a in this pop'n is 125/200 or 62.5%
| | | | | | | | | |
The square roots of 0.5 and 0.25 do not add to 1! - CORRECT
| | | | | | | | | | | | | |
ANSWER✔✔-Because I made them up... if they do not add to 1, then | | | | | | | | | | | | |
you have:|
not accounted for all of the alleles
| | | | | |
or
, you have not measured the freq. correctly
| | | | | |
or
both of these | |
Gel Electrophoresis - CORRECT ANSWER✔✔-
| | | |
Conditions/assumptions of HW: - CORRECT ANSWER✔✔-- No | | | | | | |
differential survival or reproductive success of individuals.
| | | | | |
- No migration.
| |
- No mutation.
| |
- Large population size.
| | | |
- No mate choice.
| | |
Natural selection is a cornerstone of modern evolutionary theory -
| | | | | | | | | |
CORRECT ANSWER✔✔-1. Individuals in a population vary in their traits
| | | | | | | | | |
2. Some of these differences are heritable
| | | | | |
3. More offspring are produced than can survive, and only some of
| | | | | | | | | | | |
these will survive long enough to reproduce
| | | | | |
4. Individuals with certain heritable traits are more likely to survive and
| | | | | | | | | | | |
reproduce
Questions With Answers
A scientific theory: - CORRECT ANSWER✔✔-- Is built using inductive
| | | | | | | | | |
logic
- Is 'unprovable but falsifiable'
| | | |
- Describes a lot with just a little (a model of few parts) - Makes
| | | | | | | | | | | | | | |
predictions about future observations | | |
- Scientific Method (Lab this week!)
| | | | |
Genetic variation: - CORRECT ANSWER✔✔-differences in DNA
| | | | | | |
sequences
What can cause genetic variation? - CORRECT ANSWER✔✔-A
| | | | | | | |
mutation...
- Somatic - Germ-line
| | |
and they can be:
| | |
- Deleterious
|
- Neutral
|
- Advantageous
|
,then recombination gives new combinations not present in parent
| | | | | | | | |
population
Allele Frequencies - CORRECT ANSWER✔✔-Allele Frequency = # of
| | | | | | | | |
copies of an allele/ total # of alleles in population
| | | | | | | | |
Example : A population of 100 pea plants has the following genotype
| | | | | | | | | | | |
frequencies:
50% aa, 25% Aa, 25% AA
| | | | |
What is the frequency of a? - CORRECT ANSWER✔✔-• 100 a copies for
| | | | | | | | | | | | |
the aa group
| | |
• 25 a copies for the Aa group
| | | | | | | |
• 0 a copies in the AA group
| | | | | | |
• Total 125 copies of a out of 200 total alleles
| | | | | | | | | |
• Frequency of a in this pop'n is 125/200 or 62.5%
| | | | | | | | | |
The square roots of 0.5 and 0.25 do not add to 1! - CORRECT
| | | | | | | | | | | | | |
ANSWER✔✔-Because I made them up... if they do not add to 1, then | | | | | | | | | | | | |
you have:|
not accounted for all of the alleles
| | | | | |
or
, you have not measured the freq. correctly
| | | | | |
or
both of these | |
Gel Electrophoresis - CORRECT ANSWER✔✔-
| | | |
Conditions/assumptions of HW: - CORRECT ANSWER✔✔-- No | | | | | | |
differential survival or reproductive success of individuals.
| | | | | |
- No migration.
| |
- No mutation.
| |
- Large population size.
| | | |
- No mate choice.
| | |
Natural selection is a cornerstone of modern evolutionary theory -
| | | | | | | | | |
CORRECT ANSWER✔✔-1. Individuals in a population vary in their traits
| | | | | | | | | |
2. Some of these differences are heritable
| | | | | |
3. More offspring are produced than can survive, and only some of
| | | | | | | | | | | |
these will survive long enough to reproduce
| | | | | |
4. Individuals with certain heritable traits are more likely to survive and
| | | | | | | | | | | |
reproduce
