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Biology Genetics And Evolution Difficulty: Medium

According to the ratio theory of sex-determination, which of the following is the determining factor of sex?

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Who proposed 3-D helical DNA model? Which of these is unique to flowering plants? They are extremely diverse group of organisms. In prokaryotes, multiple ribosomes (polysomes) participate in Assertion (A) Mumps in human beings leads to swelling of the limbs. Reason (R) In mumps, virus infects the parotid salivary gland.