Study your flashcards anywhere!

Download the official Cram app for free >

  • Shuffle
    Toggle On
    Toggle Off
  • Alphabetize
    Toggle On
    Toggle Off
  • Front First
    Toggle On
    Toggle Off
  • Both Sides
    Toggle On
    Toggle Off
  • Read
    Toggle On
    Toggle Off
Reading...
Front

How to study your flashcards.

Right/Left arrow keys: Navigate between flashcards.right arrow keyleft arrow key

Up/Down arrow keys: Flip the card between the front and back.down keyup key

H key: Show hint (3rd side).h key

A key: Read text to speech.a key

image

Play button

image

Play button

image

Progress

1/10

Click to flip

10 Cards in this Set

  • Front
  • Back

Meiosis: Overall:

Meiosis involves two divisions.


- meiotic cells have an interphase stage before the start of meiosis 1 which is similar to mitosis


- includes G1, S and G2 phases


- after meiosis 1, there is another brief interphase stage which is followed by meiosis 2.

Prophase 1:

- chromosomes pair up so that the chromosomes in each pair are homologous


- once paired up, crossing over occurs


- nuclear membrane starts to break down


- spindle microtubules stretch out from each pole to the equator

Crossing Over

- the exchange of genetic material between non-sister chromatids



Metaphase 1:

- paired up homologous chromosomes line up at the equator


- spindle fibers attached to the chromosomes


- make sure one chromosomes moves to one pole and the other moves to the opposite pole

Anaphase 1:

- homologous chromosomes are separated and pulled to opposite poles


- chromosomes are halved still is comprised of two sister chromatids


- cell membrane starts to prepare for its separation at the equator to form two cells



Telophase 1:

- each chromosomes from the homologous pair are found at the opposite poles


- nuclear membrane reforms around each daughter nucleus


- membrane divides through citokinesis

Prophase 2:

- cell has divided into two daughter haploid cells


- spindle microtubules stretch out from each pole again


- nuclear membrane breaks down



Metaphase 1:

- chromosomes in each cell line up at the equator and the spindle microtubules attach to the centromere of each chromosome

Anaphase 2:

- centromere devised as a result of the spindle microtubules pulling each sister chromatid to opposite poles in both cells


- each sister chromatid then becomes a chromosome





Telophase 2:

- nuclear membrane reforms around the four sets of daughter chromosomes


- cytokinesis results to divide the cytoplasm of the two cells


- the results is four daughter cells each with a haploid set of chromosomes