Zoology Meosis

Front 1

Prophase 1

Back 1

chromosomes link together to form a tetrad shape. Crossing over of genes is possible here. The chromatin condense into chromosomes, the nucleolus disappears, the nuclear membrane disassembles, and the spindle apparatus forms.

Front 2

Metaphase 1

Back 2

tetrads line up on the equator of the spindle apparatus, the fibers attach to opposite sides of the centromere and the spindle fibers attache to the kinetochore fibers.

Front 3

Anaphase 1

Back 3

Tetrads separate and are drawn to opposite poles by the spindle fibers, centromere remain intact.

Front 4

Telophase 1

Back 4

Chromosomes reach poles of respective spindles. One set of chromosomes in each of the two cells. Chromosomes uncoil, nucleolus reforms, some cells have division of centrioles!

Front 5

Prophase 2

Back 5

Nuclear envelope redissolves, spindle fibers reform, chromatin condenses, centrioles dived, kinetochore fibers form.

Front 6

Metaphase 2

Back 6

Chromosomes migrate to equator of spindle. Spindle fibers attach to kinetochore fibers.

Front 7

Anaphase 2

Back 7

Centromeres split, chromosomes are segregated into opposite sides of the cell.

Front 8

Telophase 2

Back 8

chromosomes reach poles, nuclear envelopes reform, chromosomes uncoil, nucleolues reforms, cytokinesis occurs.