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B
Genetic engineering
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C
Totipotency
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D
Quantitative genetics
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Solution
The correct option is A Chromosomal theory of inheritance
In the spring of 1902, when he was only 25, Sutton deduced that chromosomes are the basis of heredity, and that the reduction of chromosomes in meiosis is directly related to Mendel's laws of inheritance.
So, the correct answer is 'Chromosomal theory of inheritance'.