Cell Division What are the functions of cell division? What happens during the cell cycle?

Cell Division three functions of cell division are growth, repair, and reproduction Asexual reproduction – when a single celled organism reproduces through cell division Sexual reproduction – cells from two parents combine and cell division occurs

What happens during the cell cycle? A Cell grows(Interphase), prepares for division(Mitosis), and divides into two new cells(Cytokinesis), which are called daughter cells

Interphase During interphase the cell grows to full size Replication – cell makes an exact copy of its DNA Chromosomes – threadlike structures made of DNA and proteins in the nucleus In Animal Cells, the centrioles are duplicated

Mitosis The cells nucleus divides into two new nuclei and one set of DNA is distributed to each daughter cell Prophase Metaphase Anaphase Telophase

Chromosomes condense into shapes that can be seen under a microscope Prophase Chromosomes condense into shapes that can be seen under a microscope Chromatids – two rod-like parts of a chromosome

Metaphase Each chromosome attaches to a spindle fiber at its centromere Chromosomes line up on the metaphase plate

Anaphase

Telophase

Cytokinesis In animal cells, cell membrane squeezes together In plant cells, a structure called a cell plate forms across the middle