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Biology Test

Enter the letter for the matching Answer
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1.
T/F Sexual reproduction is a major source of variation in many populations
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2.
T/F Mutations always affect an organisms fitness
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3.
What is an example of temporal isolation?
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4.
A collection of individuals of the same species in a given area is a _______________
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5.
What must happen in order for new species to evolve?
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6.
If a trait had no effect on an organisms fitness, what would happen to the alelle for that trait?
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7.
5 Conditions req to maintain genetic equilibrium
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8.
3 Fields that collaborate today to explain evolution.
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9.
The number of timmes that an allele occurs in a gene pool compared with the number of times other alleles occur is called the __________ of the allele.
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10.
The situation in which allele frequencies remain constant is called _________
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11.
Which 2 important factors was Darwin unable to explain without an understanding of heredity?
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12.
Sources of Genetic Variation
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13.
Why is large population size important in maintaining genetic equilibrium
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14.
What does it mean for 2 species to be reproductively isolated from each other?
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15.
What is an example of the founder effect?
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16.
What is a mutation?
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17.
The combined gentic information of all members of a particular population is a ________________
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18.
What is directional selection?
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19.
What is disruptive selection?
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20.
Observ. by Grants: T/F Dif. in beak size=more imp. for survival during wet season, When food for finches was scarce, individuals with the largest beaks were less likely to survie
A.
Populations become reproductively isolated from each other
B.
genetic equilibrium
C.
The evolution of several hundred species of fruit flies found on dif. Hawaiian Islands that descended from the same mainland population
D.
2 or more species reproduce at dif times (pollination)
E.
1genetics 2molecular biology 3evolutionary theory
F.
true
G.
Individuals at the upper and lower ends of the curve have higher fitness than individuals near the middle
H.
false
I.
He did not know the source of the variation that was so central to his theory. He could not explain how inheritable traits were passed from one generation to the next
J.
1Mutations 2Genetic Shuffling
K.
gene pool
L.
Genetic drift has less effect on large populations
M.
relative frequency
N.
Individuals at one end of the curve have higher fitness then individuals in the middle or at the other end
O.
false/false
P.
The allele that produces this trait will not be under pressure from natural selection, and its frequency will remain unchanged
Q.
population
R.
Members of 2 populations cannot interbreed and produce fertile offspring
S.
1Random mating 2Very large population 3No movement into/out of population 4No mutations 5No natural selection
T.
any change in a sequence of DNA
Type the Answer that corresponds to the displayed Question.
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21.
Hyp tested by Grants: T/F The finches beak size/shape -enough inheritable variation to provide raw material for nat. selection The dif. finch species are descendants of common mainland ancestor
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22.
T/F Mutations always affect an organisms phenotype
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23.
Random change in allele frequencies in small populations is called ________
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24.
T/F The weight of human infants at birth is under the influence of disruptive selection.
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25.
An increase in the average size of beaks in Galapagos finches is an example of ________ selection
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26.
T/F Mutations always affect lengthy segments of a chromosome
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27.
T/F Mendel's work on inheritance was published after Darwin's lifetime.
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28.
T/F Natural selection is the only source of evolutionary change
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29.
T/F The basic mechanisms of evolutionary change cannot be observed in nature
Type the Question that corresponds to the displayed Answer.
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30.
The formation of new species

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