Question

A cell has 2N = 6 chromosomes. How many duplicated chromosomes does it have during Metaphase I of meiosis? During Anaphase I of meiosis? How many chromosomes does each daughter cell have during Metaphase II of meiosis? During Anaphase II of meiosis? Note that as long as the two sister chromatids are attached at the centromere they are considered one duplicated chromosome but after the centromere splits they become two independent chromosomes.

Answer 1

Answer:

Anaphase I - 2n = 6

Metaphase I - 2n = 6

Anaphase II- n = 3

Metaphase II- 2n = 6

Explanation:

In a meiosis cell division there are two cycle of division Meiosis I and Meiosis II. The genetic material duplicates during the S phase of meiosis I and hence at metaphase I the number of chromosomes will be 2n i.e 6. The number of chromosomes in Anaphase I is equal to the number of chromosomes in metaphase I since the chromatids remain attached during the anaphase stage. During metaphase II, the cell separates and hence the number of chromosomes at this stage is equal to n i.e 3 while at anaphase II the number of chromosomes is equal to 6  

Answer 2

Answer:

Explanation:

During metaphase I homologous chromosomes become aligned along the equator of a cell. Therefore a cell contains 6 duplicated chromosomes. It also contains 6 duplicated chromosomes at Anaphase I.

Meiosis II which is a resuctional division process results in the halfing of the chromosome number.

Therefore, Metaphase II and Anaphase II has 3 chromosomes.