The answer to this question is option D
Bottlenecks and founder effects. Genetic drift can cause big losses of genetic variation for small populations. Population bottlenecks occur when a populations size is reduced for at least one generation... reduced genetic variation from the original population
Answer:
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Explanation: answer is gregor mendal is the father of genetic in 19th century.
Answer:
Reduction of oxygen to formwater occurs during respiration only. B)