Why is the nucleus important to the cell?

Importance of Nucleus Controls all of the cell’s function Contains genetic material- DNA and chromosomes Importance of Nucleus

Chemical that contains the information for an organism’s growth and function Deoxyribonucleic acid DNA

Chromosomes DNA is packed together to make chromosomes Humans have 46 chromosomes in each cell Chromosomes

Growth Development Repair Cell Division

Growth Cells need to divide so multicellular organisms can grow. Adults have about 100 trillion cells Growth

Cells develop to become specialized to perform particular functions (skin cells, nerve cells, muscle cells…) Development

Repair Cells divide to repair the body (cuts-broken bones) Cells repair and divide at different rates. Skin cells are constantly repairing, while brain cells live a long time and don’t divide very often. Repair

Nucleus-Chromosomes-DNA

Steps of Cell Cycle Interphase Prophase Metaphase Anaphase Telophase Cytokinesis Steps of Cell Cycle

Interphase Cell begins to grow Organelles double DNA is copied Cell prepare for mitosis-the division of the nucleus Interphase

Prophase DNA condenses into chromosomes Nuclear membrane begins to disappear Prophase

Chromosomes line up across the center of the cell Metaphase

Chromosomes are split and pulled to opposite sides of the nucleus Anaphase

A new nuclear membrane forms around the separated chromosomes Telophase

The division of the cytoplasm Cytokinesis

Mitosis

Types of Asexual Reproduction Binary Fission-division of prokaryotes Budding-develop tiny buds that grow into a complete identical organism Regeneration-the growth of new cells at a site of lost body parts Types of Asexual Reproduction