LABORATORY REVIEW
MITOSIS AND MEIOSIS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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6
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24
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12
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2
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Detailed explanation-1: -If the cells have 12 chromosomes during interphase, the number of chromosomes will be retained as 12 in each of the daughter cells even after the completion of mitosis.
Detailed explanation-2: -In the G1 phase, there are 12 chromosomes. In the S-phase of the cell cycle, the amount of DNA gets doubled. There is doubling of the chromatids but the chromosomes number remains same. The number of chromosomes in the G2 phase will be same as 12 chromosomes and the number of chromatids will be 24.
Detailed explanation-3: -There are 46 chromosomes in a human cell during G1. This means that from S phase until mitosis, there are 92 chromosomes in the cell.
Detailed explanation-4: -Correct. During metaphase each chromosome consists of two identical, double-stranded DNA molecules. Therefore, if a cell normally contains 12 chromosomes, there will be 24 molecules of DNA during metaphase.
Detailed explanation-5: -In G1phase, the cell synthesizes takes place and In S phase DNA duplication occurs. initially 14 chromosomes were present in G1phase . In S phase, no change in chromosome number. So, again 14 chromosomes present.