mitosis and meiosis

how do cells duplicate for tissue growth and repair

mitosis

in mitosis, one cell reproduces ____ genetically identical daughter cells

two

mitosis - what happens in interphase

DNA replicates

mitosis - what happens in prophase

chromosomes condense and visible chromosomes appear

mitosis - what happens in metaphase

chromosomes line up

what 2 events happen in anaphase

chromosomes are pulled apart to the poles and cell division begins

what 2 events happen in telophase

two nuclei form and daughter cells separate in cytokinesis

5 phases of mitosis in order

1. interphase

2. prophase

3. metaphase

4. anaphase

5. telophase

what do chromosomes contain

genetic information

what 3 events happen in the process of meiosis

1. nucleus of a germ cell divides

2. each part divides again (two fissions)

3. four gametes (sex cells) are produced

each sex cell has ______ the genetic information of the original germ cell

half

3 phases of meiosis in order

1. interphase

2. meiosis I

   1. prophase I

   2. metaphase I

   3. anaphase I

   4. telophase I

3. meiosis II

   1. prophase II

   2. metaphase II

   3. anaphase II

   4. telophase II

meiosis - what happens in interphase

DNA replicates

meiosis - what happens in prophase I

homologous chromosomes pair and cross over

meiosis - what happens in metaphase I

homologous chromosomes line up in pairs

meiosis - what happens in anaphase I

one chromosome from each homologous pair is pulled towards each pole

meiosis - what happens in telophase I

nuclear membranes form as the cell separates into two

meiosis - what happens in prophase II

daughter cells contain half the chromosomes of the original cell

meiosis - what happens in metaphase II

chromosomes align

meiosis - what happens in anaphase II

sister chromatids separate and move to opposite ends of the cells

meiosis - what happens in telophase II

nuclear membranes form as the two cells separate into four haploid daughter cells

gamete in males

sperm

gamete in females

eggs (ova)