CELL CYCLE EOI REVIEW BIOLOGY Day 3 Lookabaugh

Cell Cycle process in a cell leading to its division and duplication (replication) that produces two daughter cells M phase- period of cell division G 1 phase- growth of cell S phase- replication of chromosomes (DNA) G 2 - preparation for mitosis (Interphase is G 1, S & G2 combined)

Mitosis Cell division Used for growth, development & repair (asexual reproduction) Produces 2 daughter cells that are genetically identical Chromosome numbers are diploid (2n) Somatic cells (body cells)

Meiosis Cell division Used to create sex cells (sexual reproduction) Produces 4 daughter cells that are genetically different (genetic variation) Crossing over Chromosome numbers are haploid (n) Gamete cells (sperm & egg)

Fertilization Fertilization is a process of two gametes (haploid sex cells) combining together and making a zygote (diploid somatic cell). The zygote will go through the process of mitosis and development into a baby. The individual will go through meiosis in their sex organ creating gametes.

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7. Some chemicals help stop a certain disease during cell growth. The diagram shows where in the cell cycle these chemicals affect the disease. Based on the diagram, most of the chemicals affect cells during A.Mitosis B.DNA replication C.The growth stage D.The preparation for division

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9. In the western red lily, Lilium philadelphicum, mitosis produces 24 chromosomes in each daughter cell. How many chromosomes does meiosis produce in each gamete cell of the western red lily? A.6 B.12 C.24 D.48

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