Read each of the statements below and then on the line...

Read each of the statements below and then on the line provided write down the phase of mitosis or meiosis that the action occurs. If the action occurs during both processes, write both and which phase. As an example, I have completed the first one for you. 1. Metaphase I Meiosis I Homologous chromosomes line up in the center of the cell 2. _______________ Replicated chromosomes line up on the equator of the cell 3. _______________ Kinetochore microtubules pull homologous pairs to opposite poles of the cell. 4. _______________ 4 haploid (n) daughter cells form 5. _______________ Cells undergo a round of DNA replication 6. _______________ Chromosomes become visible as discrete structures 7. _______________ Sister chromatids separate at the centromere 8. _______________ 2 haploid (n) daughter cells form 9. _______________ The nuclear envelope reforms 10. _______________ Kinetochore microtubules capture kinetochores on replicated chromosomes 11. _______________ The nucleolus disappears and the nuclear envelope breaks down 12. _______________ Crossing-over (if any) occurs 13. _______________ Individual chromatids migrate to opposite poles of the cell

Transcript

00:01 Okay, this question says read each of the sentence of the statements below and then on the line provided write down the phase of mitosis or meiosis that the action occurs if the action occurs during both processes write both and which phase as an example, i have completed the first one for you so the first one says homologous chromosomes like line up in the center of the cell and in this case you have metaphase one of meiosis one.

00:25 Now, let's go for equation two it says replicated chromosomes line up on the equator of the cell and this is actually for metaphase of mitosis in also meiosis meiosis two okay, the only difference between a metaphase of mitosis and meiosis two is that in mitosis you have two copies of each chromosome and in meiosis two you have only one copy of each chromosome but in both cases the replicated chromosomes are lining up in the equator of the cell um question three says kinetochore microtubules pull homologous pairs to opposite poles of the cell so it is talking about anaphase anaphase one of meiosis one because in my in meiosis one your chromosomes are going to be aligned like this this is one pair and this is another pair okay, and during anaphase what is going to happen is that? this chromosome is going to start moving or each of them is going to move to different poles it means something like this like this and like this and the same for this chromosome.

01:46 Okay.

01:49 So this is anaphase as you can see here homologous chromosomes are moving to different poles um question four says four haploid daughter cells form and this is for specifically this is in telophase two of meiosis two you remember that the end product of meiosis two is the production production of four daughter cells and that are haploid question five says cells undergo a round of dna replication and in this case it is going to be for specifically it's going to be for interface of mitosis and meiosis one remember that dna replication occurs before mitosis and also before meiosis one it does not it does not occur again before meiosis two.

02:50 Okay, only before meiosis one question six says chromosomes become visible as discrete discrete structures and this always happens in prophase in prophase of mitosis meiosis one in meiosis two okay, this happens all always in in prophase then you have question seven that says sister chromatids separate at the centromere so in this case anaphase of meiosis one is like this but during anaphase of mitosis and meiosis two your chromosomes are like this, right? so in this case you're going to separate your chromosomes by the centromere like this and one chromatid is going to be it's going to be here and another chromatid is going to be here but when your chromatids are separated from each other, they are no longer called chromatids but chromosomes this happens in meiosis two and also in mitosis so in this case seven says you're going to have anaphase anaphase of mitosis and also meiosis two because in meiosis one you are not separating your chromatids like this you are just moving your chromosomes to opposite poles now eight it says two haploid daughter cells form haploid daughter cells it occurs in telophase of meiosis one because in mitosis you produce you produce a two daughter cells that are diploid...

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