Meiosis Practice Formative

Produces two new cells

Produces cells with half of the genetic material in them

Has two rounds of cell division

Makes sex cells/gametes

Produces identical cells (identical to each other and to the parent) as long as there are no mutations

Is intended to repair tissue or grow the organism

Produces diploid cells

In a human it only in the ovaries or testes

Produces haploid cells

Produces 4 cells

Produces cells that can be used in sexual reproduction

Tetrads form

2 new nuclei may form

Centrioles produce spindle fibers

Spindle fibers break down

Spindle fibers move tetrads to the midline of the cell

DNA coils and chromosomes form

The nuclear envelope breaks down

Spindle fibers that aren't connected to chromosomes start to stretch the cell

Cell divides into 2

Spindle fibers pull apart the homologous pairs (separating the tetrads)

Crossing over occurs

Spindle fibers stretch out the cell

Spindle fibers break down

The DNA uncoils

The cell divides into 4 new haploid cells

The number of chromosomes doubles in the cell

Spindle fibers continue to be formed

Spindle fibers pull apart the sister chromatids

4 new nuclei form

Spindle fibers move chromosomes to the midline of the cell (not in pairs)

DNA coils and chromosomes form (if the DNA uncoiled in the previous step)

Nuclear envelope breaks down (if two new nuclei were formed in the previous step)

FYI: the top and bottom chromosomes are intended to be the same size