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Echo asked in Science & MathematicsBiology · 7 years ago

What is the number of chromosomes and chromatids in each phase of Mitosis and Meiosis?

I've seen that these question have already been asked on here and have been answered, but there was never a 0 on the chromatids in the answers I saw, and while I don't remember where they are exactly, I remember learning in class that during some of the phases the chromatid numbers are 0, so I'm trying again!

So, using the 46 chromosomes in human cells, how many chromosomes and chromatids are in the following phases for-

Mitosis:

G1 ___ Chromosomes and ___ Chromatids

S ___ Chromosomes and ___ Chromatids

G2 ___ Chromosomes and ___ Chromatids

Prophase ___ Chromosomes and ___ Chromatids

Metaphase ___ Chromosomes and ___ Chromatids

Anaphase ___ Chromosomes and ___ Chromatids

Early Telophase __ Chromosomes and __ Chromatids

Late Telophase __ Chromosomes and __ Chromatids

End of Cytokinesis __ Chromosomes and __ Chromatids

And Meiosis 1:

G1__ Chromosomes and __ Chromatids

S __ Chromosomes and __ Chromatids

G2 __ Chromosomes and __ Chromatids

Prophase 1 __ Chromosomes and __ Chromatids

Metaphase 1 __ Chromosomes and __ Chromatids

End of Anaphase 1 __ Chromosomes and __ Chromatids

Telophase 1 (Early) __ Chromosomes and __ Chromatids

Cytokinesis 1 __ Chromosomes and __ Chromatids

Meiosis 2 (no synthesis):

Prohase 2 ___ Chromosomes and ___ Chromatids

Metaphase 2 ___ Chromosomes and ___ Chromatids

End of Anaphase 2 ___ Chromosomes and ___ Chromatids

Telophase 2 (early) ___ Chromosomes and ___ Chromatids

Cytokinesis 2 ___ Chromosomes and ___ Chromatids

3 Answers

Relevance
  • 7 years ago
    Favorite Answer

    The number of chromosomes is doubled in prophase. At anaphase, each daughter cell gets the same number as the parent cell had. This is the case with mitosis.

    In meiosis too the number of chromosome is doubled at prophase, but at anpahase i the number in each daughter cell is halved.

    In meiosis the situation is different with respect to the number of chromosomes. Each chromosome has two chromatids which can be best seen at metaphase.

    /

  • 7 years ago

    In both G1s there are 0 chromatids

    In anaphase, telophase and cytokinesis of mitosis and meiosis 2 there are 0 chromatids.

  • Roland
    Lv 7
    7 years ago

    You should be able to figure it out for yourself:

    There can be no "chromatids" until DNA is synthesized - when does that happen?

    There can be no "chromatids" after centromeres split - when does that happen?

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