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NEETBotanyCell Cycle and Cell Division

A meiocyte is observed at the G ₁ phase with 20 chromosomes and a DNA content of 2 C . What will be the chromosome number and DNA content per cell at the end of Meiosis I?

Options

  1. A10 chromosomes and 1 C DNA
  2. B20 chromosomes and 2 C DNA
  3. C10 chromosomes and 2 C DNA
  4. D10 chromosomes and 4 C DNA

Correct answer

C. 10 chromosomes and 2 C DNA

Step-by-step solution

In a meiocyte, the cell cycle begins with the G ₁ phase where the chromosome number is 20 ( 2n ) and the DNA content is 2 C . During the S phase, DNA replication occurs, doubling the DNA content to 4 C , while the chromosome number remains 20 . Meiosis I is a reductional division where homologous chromosomes separate into two daughter cells. This halves the chromosome number to 10 ( n ) per cell. The total DNA content ( 4 C ) is also distributed equally between the two daughter cells, resulting in 2 C of DNA per ce

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