Stages Of Chromosomes Obss And Answers

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Stage

Events Occurring

Prophase 1

• Chromosomes become visible
• Nuclear membrane disappears
• Chromosomes shorten and condense

Metaphase 1
(met means: middle)

• Chromosomes line up at equator

Anaphase 1

• Pairs of homologous chromosomes move apart (one member of each pair moves to opposite poles, 23 chromosomes at each pole)

Telophase 1

• Cytoplasm divides into two parts
(creating two haploid cells)
Second Division

Prophase 2

• New spindle forms at each end of original spindle • Chromosomes gradually move towards equator Metaphase 2

• Chromosomes line up at equator
• Centrometers divide so each chromatid is now a separate chromosome

Anaphase 2

• New chromosomes move to opposite poles Telophase 2

• Nuclear membrane begins to form & cytoplasm starts to divide forming four new cells

Stage

Events Occurring

Prophase 1

• Chromosomes become visible
• Nuclear membrane disappears
• Chromosomes shorten and condense

Metaphase 1
(met means: middle)

• Chromosomes line up at equator

Stage

Events Occurring

Anaphase 1

• Pairs of homologous chromosomes move apart (one member of each pair moves to opposite poles, 23 chromosomes at each pole)

Telophase 1

• Cytoplasm divides into two parts
(creating two haploid cells)
Second Division

Prophase 2

• New spindle forms at each end of original spindle • Chromosomes gradually move towards equator Metaphase 2

• Chromosomes line up at equator
• Centrometers divide so each chromatid is now a separate chromosome

Anaphase 2

• New chromosomes move to opposite poles Telophase 2

• Nuclear membrane begins to form & cytoplasm starts to divide forming four new cells

Stage

Events Occurring

Prophase 1

• Chromosomes become visible
• Nuclear membrane disappears
• Chromosomes shorten and condense

Metaphase 1
(met means: middle)

• Chromosomes line up at equator

Anaphase 1

• Pairs of homologous chromosomes move apart (one member of each pair moves to opposite poles, 23 chromosomes at each pole)

Telophase 1

• Cytoplasm divides into two parts
(creating two haploid cells)
Second Division

Stage

Events Occurring

Prophase 2

• New spindle forms at each end of original spindle • Chromosomes gradually move towards equator Metaphase 2

• Chromosomes line up at equator
• Centrometers divide so each chromatid is now a separate chromosome

Anaphase 2

• New chromosomes move to opposite poles Telophase 2

• Nuclear membrane begins to form & cytoplasm starts to divide forming four new cells
Stage

Events Occurring

Prophase 1

• Chromosomes become visible
• Nuclear membrane disappears
• Chromosomes shorten and condense

Metaphase 1
(met means: middle)

• Chromosomes line up at equator

Anaphase 1

• Pairs of homologous chromosomes move apart (one member of each pair moves to opposite poles, 23 chromosomes at each pole)

Telophase 1

• Cytoplasm divides into two parts
(creating two haploid cells)
Second Division

Prophase 2

• New spindle forms at each end of original spindle • Chromosomes gradually move towards equator Metaphase 2

• Chromosomes line up at equator
• Centrometers divide so each chromatid is now a separate chromosome

Stage

Events Occurring

Anaphase 2

• New chromosomes move to opposite poles Telophase 2

• Nuclear membrane begins to form & cytoplasm starts to divide forming four new cells
Stage

Events Occurring

Prophase 1

• Chromosomes become visible
• Nuclear membrane disappears
• Chromosomes shorten and condense

Metaphase 1
(met means: middle)

• Chromosomes line up at equator

Anaphase 1

• Pairs of homologous chromosomes move apart (one member of each pair moves to opposite poles, 23 chromosomes at each pole)

Telophase 1

• Cytoplasm divides into two parts
(creating two haploid cells)
Second Division
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