1) According to the biological species concept, a group of organisms is consider

Question

1) According to the biological species concept, a group of organisms is considered a separate species if it __________ from other groups of organisms.

A) is physically different

B) behaves differently

C) is reproductively isolated

D) All of the above

2) In a large population of flowers, the frequency of a trait's recessive allele (g) is 0.7. What is the frequency of the trait's dominant allele (G)?

A) 0.3

B) 0.6

C) 0.7

D) 0.13  

3) Selection that favors both extremes of the array of phenotypes is called ___________ selection.

A) extreme

B) stabilizing

C) directional

D) disruptive

4) Of the 5 agents of evolution, there is one which provides the source of genetic variation which the other four act on. This one agent of evolution is _________.

A) selection

B) mutation

C) genetic drift

D) non-random mating

5) The population has 10 AA individuals, 5 Aa individuals, and 35 aa individuals. What are the allele A) A=0.5

a=0.5

B) A=0.25

a=0.75

C) A=0.15

a=0.4

D)A=0.2

a=0.8

6) The population has 100 AA individuals, 75 Aa individuals, and 125 aa individuals. What are the allele frequencies of A and a?

A) A=0.232

a=0.768

B) A=0.175

a=0.2

C) A=0.4

a=0.6

D) A=0.458

a=0.542

Explanation / Answer

1)C) is reproductively isolated

reproductive isolation is the primary indicator of a difference in species. All other listed factors may or may not be present

2) a 0.3

p + q = 1, p + 0.7 = 1, p = 0.3

3)d Distruptive selection is the name of this type of selection.eg A species of birds showing large and small beaks but not many of intermediate size

4)B) Mutation. It is the only factor which brings about the genetic variation. The others follow

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