OBJECTIVE OF GENE FREQUENCIES

Four options are given at the end of each statement. You should encircle one option from them.

Which of the followings should be large for Hardy Weinberg theorem:

(a) Gene       (b) Population         (c) Migration          (d) Mutation
Which of the followings must not occur for Hardy Weinberg theorem:

(a) Gene (b) Population (c) Allele (d) Mutation Match neutral selection with one of the following:

(a) Gene flow (b) Genetic drift (c) Natural selection d) Mutation The change in gene frequencies by chance is called:

(a) Gene flow (b) Genetic drift      (c) Natural selection (d) Mutation

Genetic  a new colony is called:

k a) Gene flow (b) Launder effect (c) Natural selection (d) Mutation The selection which favors the intermediate against extremes is called:

(a) stabilizing(b) Disruptive          (c) Directional        (d) None

The natural selection in which individuals of the most commons phenotypes are at disadvantage is called:

a) stabilizing(h) Disruptive         (c) Directional        (d) None

8. The occurrence of two or more distinct forms in a population without
   a range of phenotypes between them is: (a) Gene flow (b) Founder effect (c) Natural selection (d) Polymorphism
9. The formation of new species is called:

(a) Gene flow (b) Genetic drift              (c) Speciation            (d) Mutation

1. The speciation occurs when subpopulations become geographically isolated from one another is called:

(a) Sympatric (b) allopatric                   (c) Parapatric             (d) none

1. The speciation occurs in demes is:

(a) Sympatric (b) Parapatric                 (c) Allopatric              (d) none

Ans:

1. (b) 2. (d) 3. (b) 4. (b) 5. (b) 6. (a) 7. (b) 8. (d) 9. (c) 10. (b)11.

Fill in the blanks

1. The total genes of a trait in a population are called _______________ pool.
2. The combination of the principles of population genetics and Darwinian evolutionary theory is called __________________ synthesis.
   1. The study of the genetic events in gene pools is called _____________
      genetics.
   2. The change in gene frequencies by chance is called _____________
   3. Genetic drift in a new colony is called______________ effect.
   4. A genetic drift on a population which has been drastically reduced disasters is called ____________ neck effect.
   5. Changes in gene frequency due to migration of individuals are called__________ flow.
   6. Changes in the structure of genes and chromosomes are called___________.
   7. The measure of the tendency for gene frequencies to change through mutation is called _______________ pressure.
   8. The tendency for natural selection to occur and upset Hardy-Weinberg equilibrium is called _________________ pressure.
   9. The selection in which individuals at one phenotypic extreme are at a disadvantage as compared to al! other individuals in the population is called _______________ selection.
   10. The natural selection in which individuals of the most commons phenotypes are at disadvantage is called _____________ selection.
   11. The selection which favours the intermediate against extremes is called __________ selection.
   12. The Occurrence of two or mo;e distinct forms in a population without a range of phenotypes between triem is called ______________.
   13. ______________polymorphism occurs when different phenotypes are maintained at relatively stable frequencies in the population.

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