CELL STRUCTURES AND FUNCTION
CELL CYCLE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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have half the genetic material found in the parental cell
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be genetically identical
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be genetically identical to the parent cell
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synthesize the missing genetic material on their own
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Detailed explanation-1: -If there is no S phase, then number of chromosome will decrease by half every generation. This will then create abnormalities within the organism-and these abnormalities can even be fatal-due to non-uniformity of that organism’s chromosome count.
Detailed explanation-2: -Then, at a critical point during interphase (called the S phase), the cell duplicates its chromosomes and ensures its systems are ready for cell division. If all conditions are ideal, the cell is now ready to move into the first phase of mitosis.
Detailed explanation-3: -The number of chromosomes in human cells are 46. i.e, these are present in pairs of 23. These pairs break apart and get separated in meiosis I. Thus, each of the two daughter cells formed after first meiotic division have half the number of chromosomes, i.e., 23.
Detailed explanation-4: -At the end of mitosis, the two daughter cells will be exact copies of the original cell. Each daughter cell will have 30 chromosomes. At the end of meiosis II, each cell (i.e., gamete) would have half the original number of chromosomes, that is, 15 chromosomes.