CELL DIVISION
MEIOSIS AND GENETIC VARIATION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Crossing over
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Independent assortment (due to random orientation
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Gene mutation
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Random fertilization
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Detailed explanation-1: -As a result of mutation, variation occurs in the genetic material of an organism. But mutations can never be a sexual source of genetic variation. As mutations cannot occur during sexual events like fertilization.
Detailed explanation-2: -Answer and Explanation: The answer is C. Mitosis of fertilized eggs. Mitosis of fertilized eggs is not a source of genetic variation.
Detailed explanation-3: -Answer: Mitosis. A single cell splits during the mitosis stage to give rise to similar cells known as daughter cells.
Detailed explanation-4: -Mutations are the original source of genetic variation. A mutation is a permanent alteration to a DNA sequence. De novo (new) mutations occur when there is an error during DNA replication that is not corrected by DNA repair enzymes.