A randomly mating population has the dominant allele “B” and the recessive allele “b” at the frequencies 0.7 and 0.3 respectively. A sudden cataclysmic event causes all the homozygous recessive individuals to die. However, the population simply carries on with life and gets busy mating. What was the proportion of homozygous recessive individuals before the cataclysm, and what is the proportion of homozygous recessive individuals born in the first generation after the cataclysm?

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