Question

The amount of DNA in cells of a particular species is measured at various stages of meiosis; the following amounts are found: 3pg, 6pg, 12pg: Match the amounts of DNA found to the stages of the cell cycle (you may use each amount more than once, all amounts may not be needed etc). Explain your choice.

Answer 1

Following are the Stage of meiosis

a. G 1

b. Prophase I

c. G 2

d. telophase II and cytokinesis

e. Anaphase I

f. Metaphase II

Explanation

G1 occurs prior to S phase and the doubling of the amount of DNA and prior to the completion of the meiosis II and cytokinesis, which will result in a haploid cell, containing one-half the amount of DNA that was contained in the cell in G1. (6pg)

During prophase I of meiosis, the amount of DNA in the cell is two times the amount in G1.(12pg)

G2 takes place directly after the completion of S phase, so the amount of DNA is two times the amount prior to the S phase (12 pg)

Following cytokinesis associated with meiosis II, each daughter cell will contain only one-half the amount of DNA of a mother cell found in G1 of interphase. (3 pg)

During anaphase I of meiosis, the amount of DNA in the cell is two times the amount in G1.(12 pg)

Metaphase II takes place after the cytokinesis associated with meiosis I and results in the daughter cells receiving only one-half the DNA found in their mother cell. In metaphase II of meiosis, the amount of DNA in each cell is the same as G1 becauseeach chromosome still consists of two DNA molecules (6 pg)