INTRODUCTION TO MICROSCOPY CELL BIOLOGY
DIFFERENTIATED CELL
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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To double the number of chromosomes going into sex cells
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To halve the number of chromosomes going into sex cells
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To triple the number of chromosomes going into sex cells
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To not change the number of chromosomes going into sex cells
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Detailed explanation-1: -Because meiosis creates cells that are destined to become gametes (or reproductive cells), this reduction in chromosome number is critical-without it, the union of two gametes during fertilization would result in offspring with twice the normal number of chromosomes!
Detailed explanation-2: -It is important that gametes have half the amount of DNA (haploid) so that at fertilisation when the egg and sperm combine it results in a cell with a full complement of DNA. Errors can occur during meiosis producing gametes with an extra or missing chromosome.
Detailed explanation-3: -In Anaphase of Meiosis I, one chromosome each of the homologous pair is moved to the opposite end by the spindle apparatus, instead of a chromatid as in Mitosis. Hence, the number is reduced to half.