CELL STRUCTURES AND FUNCTION
CELL CYCLE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Cell division happens only once, and DNA replicates after the division
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Cell division happens only once, and DNA replicates before the division
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Cell division happens twice, and DNA replicates before the second division
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Cell division happens twice, and DNA replicates before the first division
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Detailed explanation-1: -Which statement best explains why meiosis produces haploid cells rather than diploid cells? Haploid cells join to form an organism that has half the number of chromosomes as the parent. Haploid cells join to form an organism that has a complete set of chromosomes.
Detailed explanation-2: -In meiosis, a single cell divides twice to produce four daughter cells. These daughter cells or sex cells have exactly half the genetic material of normal gametes. Meiosis necessitates two divisions since it produces a haploid cell with half the amount of chromosomes. Thus meiosis occurs twice.
Detailed explanation-3: -Answer and Explanation: Meiosis consists of two cell divisions in order to halve first the genetic information and then the genetic material. A cell entering meiosis is diploid (2n) and has had its DNA duplicated so that now it has double the amount of a normal cell.
Detailed explanation-4: -During meiosis, a diploid germ cell undergoes two cell divisions to produce four haploid gamete cells (e.g., egg or sperm cells), which are genetically distinct from the original parent cell and contain half as many chromosomes.