Question

In what phase of meiosis are tetrads separated as homologous chromosomes are pulled to opposite poles of the cell?

Metaphase I

Metaphase II



Anaphase I

Anaphase II

Answer 1

Well, when talk about stuff being pulled away, that is referred to Anaphase. Metaphase is where they are aligned in the middle of the cell. So now, do you know what happens in either Anaphase I or Anaphase II?

Answer 2

Not really? can you please explain @alphadxg

Answer 3

@alphadxg ?

Answer 4

Let me tell you what happens in germ cells (gametes, sperm etc).

you first have Interphase, this consists of G1, S, G2 phase. (Growth Phase, biggest thing to remember here is that S phase of Interphase is where the chromosomes are condensed.) In this phase the centrosomes will also be duplicated.



A = Centrosomes one of them will be duplicated to form (2) centrosomes.
B = nucleus (Consisting of chromosomes tangled up).

Then you have prophase (Beggining of Mitosis) because this is a germ cell you will have homologous chromosomes (Meaning that 2 chromosomes will be paired together in Metaphase (One from male and one from female parent. Now you will have these chromosomes condenseing in prophase here and making the chromosomes more visable.



Now you will have Metaphase, in metaphase you will have the nucleus that will break up, allowing the centrosomes (That were duplicated in interphase) go to each side of the cell and these homologous chromosomes will align in the middle of the cell. The centrosomes consist of microtubule kinetchores that will connect to each homolog chromosomes from one side of the cell, you will also have Polar tubules, these will connect to the other side of the polar centersome - this will elongate the cell because they push each other to make the cell bigger.


Where A is the Polar microtubules (Push against each other to make the cell bigger)
B - kinetchores that will connect to the homologs
C - these are homologous chromosomes meaning that there is a total of 1 chromosome from father, and one chromosomes from mother - remember each chromosomes consists of 2 sister chromatids (So father + mother = 4 sister chromatids total).

Then you have anaphase I where the homologs seperate (NOT SISTER CHROMATIDS, sister chromatids seperate in Anaphase II). (Meiosis II is almost identicle to Meiosis I in diploid cells).