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Cambridge AS & A Level Biology 9700 — Revision Notes

1 · Cell Structure

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2 · Biological Molecules

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3 · Enzymes

0/29

4 · Cell Membranes and Transport

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5 · The Mitotic Cell Cycle

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6 · Nucleic Acids and Protein Synthesis

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7 · Transport in Plants

0/28

8 · Transport in Mammals

0/39

9 · Gas Exchange

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10-11 · Infectious Disease and Immunity

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12 · Energy and Respiration

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13 · Photosynthesis

0/23

14-15 · Homeostasis and Control

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16 · Inherited Change

0/34

17-18 · Selection, Evolution, Classification and Conservation

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19 · Genetic Technology

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Other lessons

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Quiz

17.2.5 Natural Selection- Hardy-Weinberg Principle – Exam questions

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  • Questions count: 14
  • Passing grade: B+
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1.
Which statement best describes Hardy–Weinberg principle?
A group of organisms of the same species living in the same place at the same time and able to interbreed.
An environmental factor that affects the survival and reproductive success of individuals with particular phenotypes.
A model predicting that allele and genotype frequencies stay constant between generations if certain conditions are met.
All the alleles of all the genes present in a population at a given time.
2.
The Hardy-Weinberg principle describes a population in which
mutation rates are high
natural selection is strong
allele frequencies stay constant from generation to generation
migration is frequent
3.
Which is NOT a condition of Hardy–Weinberg equilibrium?
Large population
Strong natural selection
Random mating
No migration
4.
Why can Hardy-Weinberg equilibrium occur only in large populations?
Why can Hardy-Weinberg equilibrium occur only in large populations?
Large populations are likely to have more variable environments.
More individuals means less chance for natural selection to occur.
Genetic drift is a much stronger force in small versus large populations.
Large populations make random mating virtually impossible.
Large populations tend to last longer than small ones.
5.
A population of frogs is 9 percent speckled (recessive) and 91 percent without speckles. What are the frequencies of the p and q alleles at Hardy-Weinberg equilibrium?
A population of frogs is 9 percent speckled (recessive) and 91 percent without speckles. What are the frequencies of the p and q alleles at Hardy-Weinberg equilibrium?
p = 0.49, q = 0.51
p = 0.60, q = 0.40
p = 0.70, q = 0.30
p = 0.49, q = 0.30
p = 0.49, q = 0.09
6.
Nine percent of an anteater population has a short snout (recessive). At Hardy-Weinberg equilibrium, what is the expected percent heterozygous?
Nine percent of an anteater population has a short snout (recessive). At Hardy-Weinberg equilibrium, what is the expected percent heterozygous?
26.0
30.0
34.0
38.0
42.0
7.
Which condition is required to keep the squirrel population of the previous question in Hardy-Weinberg equilibrium?
Which condition is required to keep the squirrel population of the previous question in Hardy-Weinberg equilibrium?
Random mating
Genetic drift
Mutation
Gene flow
8.
What would be the approximate frequency of the heterozygote if this population were in Hardy-Weinberg equilibrium? (see the figure)
What would be the approximate frequency of the heterozygote if this population were in Hardy-Weinberg equilibrium? (see the figure)
20 percent
45 percent
48 percent
72 percent
9.
Is this population in Hardy-Weinberg equilibrium? (see the figure)
Is this population in Hardy-Weinberg equilibrium? (see the figure)
Yes
No
Cannot tell from the information given
Maybe, if individuals are migrating
10.
This is a characteristic of a population in Hardy-Weinberg equilibrium.
SAT Biology - Question 218
A
B
C
D
E
11.
Which condition is required for Hardy-Weinberg equilibrium?
Small population size
Random mating
Strong natural selection
Frequent migration
12.
Which is NOT a Hardy-Weinberg assumption?
Large population
Random mating
No mutation
Strong selection
13.
The frequency of homozygous recessive individuals is 0.25. The recessive allele frequency is:
0.5
0.25
0.0625
0.75
14.
Using the pie chart, what is the frequency of allele r?
Dr Dabour Hub Academy - figure 1
0.64
36
0.36
0.5
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Part of 17-18 · Selection, Evolution, Classification and Conservation — see every lesson and quiz in this unit.
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