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Solution


Q.

In Hardy-Weinberg equation, the frequency of heterozygous individual is represented by             [2016]
1 p2  
2 2pq  
3 pq  
4 q2  

Ans.

(2)


In a stable population, for a gene with two alleles, ‘A’ (dominant) and ‘a’ (recessive), if the frequency of ‘A’ is p and the frequency of ‘a’ is q, then the frequencies of the three possible genotypes (AA, Aa and aa) can be expressed by the Hardy-Weinberg equation:

p2+2pq+q2=1

where 

      p2 = Frequency of AA (homozygous dominant) individuals

      q2 = Frequency of aa (homozygous recessive) individuals

      2pq = Frequency of Aa (heterozygous) individuals