A particular population of chickens has a frequency for the dominant allele as 0.70 and a frequency for the recessive allele as

Question

A particular population of chickens has a frequency for the dominant allele as 0.70 and a frequency for the recessive allele as 0.30. Which expression is the correct way to calculate the frequency of individuals that are heterozygous? 
A. (0.70) x (0.30) 
B. (0.70) - (0.30) 
C. 2x (0.70) × (0.30) 
D. 2x (0.70 -0.30)

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