A number of homozygous dominant flowers in a population is 320 and number of heterozygous flowers is 160. The number of dominant alleles in this population is
Correct answer: C. 800
- A. 320
- B. 600
- C. 800
- D. 100
Explanation
Of the 480 plants with pink lowers, 320 are homozygous (AA) and 160 are heterozygous (Aa). Since these are diploid organisms, there are a total of lOOO copies of genes for lower color in the population. The dominant allele accounts for 800 of these genes (320x2 = 640 for AA plants, plus 160x1 = 160 for An individuals).
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Evolution describes heritable change in populations over generations through variation, natural selection and adaptation. Lamarckism explains inheritance of acquired characteristics, while Darwinism explains selection of favourable inherited variations; these historical explanations must not be confused with the modern genetic account of evolutionary change.
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