8
Question
Chromosome theory of XY sex determination was proposed by.
Chromosome theory of XY sex determination was proposed by.
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Solution
The correct option is B Wilson and Stevens
Stevens was interested in the process of sex determination. While studying the mealworm, she found that the males made reproductive cells with both X and Y chromosomes whereas the females made only those with X. She concluded that sex is inherited as a chromosomal factor and that males determine the gender of the offspring. Not appreciated, yet. At the time, the chromosomal theory of inheritance was not yet accepted, and it was commonly believed that gender was determined by the mother and/or environmental factors. Most scientists did not embrace Stevens's theory immediately. Another researcher, Edmund Wilson, made a similar discovery at about the same time, but Stevens is generally considered to have made the larger theoretical leap (one which was ultimately proven correct).
So, the correct answer is 'Wilson and Stevens'.
Stevens was interested in the process of sex determination. While studying the mealworm, she found that the males made reproductive cells with both X and Y chromosomes whereas the females made only those with X. She concluded that sex is inherited as a chromosomal factor and that males determine the gender of the offspring. Not appreciated, yet. At the time, the chromosomal theory of inheritance was not yet accepted, and it was commonly believed that gender was determined by the mother and/or environmental factors. Most scientists did not embrace Stevens's theory immediately. Another researcher, Edmund Wilson, made a similar discovery at about the same time, but Stevens is generally considered to have made the larger theoretical leap (one which was ultimately proven correct).
So, the correct answer is 'Wilson and Stevens'.
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