1 8 15 22 29 36 43 2 9 16 23 30 37 44 3 10 17 24 31 38 45 4 11 18 25 32 39 46 5 12 19 26 33 40 47 6 13 20 27 34 41 48 7 14 21 28 35 42 49 How many daughter cells are produced during mitosis? Are they haploid or diploid? Two diploid cells During which phase of mitosis do chromosomes line up in the middle of the cell? Metaphase How many chromosomes do humans have in their body cells? 46 or 23 pairs When does a cell copy its DNA? Be specific. S-phase of interphase What kind of cells are made from mitosis? Somatic (body) cells What happens when the cell cycle is not regulated (out of control)? Cancer What is the term used to describe a cell that has TWO sets of chromosomes (one from mom and one from dad)? Diploid (2n) What is the term used to describe cells that have just ONE set of chromosomes? Haploid (n) Name the phases of mitosis in order. Prophase, metaphase, anaphase, telophase During which phase of mitosis does chromatin condense into chromosomes? prophase During which phase of mitosis do spindle fibers pull sister chromatids apart? anaphase What is the process when the parent cell is cleaved into two new daughter cells? cytokinesis During which phase of mitosis does the nuclear envelope begin to reappear? Telophase What is the phase where cell growth occurs? G1 and G2 of interphase What is the process in which gametes are produced? Meiosis What phase is represented by the picture? Prophase What phase is represented in the picture? Metaphase What phase is represented in the picture? Anaphase What phase is represented by the picture? Telophase How many cell divisions are involved in meiosis? 2 What are the organelles that produce spindle fibers? Centrioles When does the process of crossing-over occur? Prophase 1 Why does crossing-over occur? To increase genetic diversity During what process of meiosis do homologous chromosomes line up in the center of the cell? Metaphase 1 At the end of meiosis 1 how many cells are produced? 2 During which phase of meiosis are sister chromatids pulled apart? Anaphase 2 During which phase of meiosis do homologous chromosomes get separated? Anaphase 1 If a cell begins meiosis with 34 chromosomes, how many will the resulting four cells have? 17 What is a karyotype? A picture of an organism’s chromosomes in a mitotic cell What are all chromosomes besides sex chromosomes referred to as? Autosomes What are a male’s sex chromosomes? XY What are a female’s sex chromosomes? XX What two things can be determine by analyzing a karyotype? Gender and genetic disorders What is the structure that holds sister chromatids together? Centromere What genetic disorder is shown in this karyotype? Down Syndrome What is Turner Syndrome? When a female is missing one of her X chromosomes What is Klinefelter Syndrome? When a male has an extra X chromosome If an organisms diploid cells have 30 chromosomes, how many chromosomes would be in it’s sex cell? 15 What is the longest phase of the cell cycle? Interphase What is the longest phase of mitosis? Prophase What is spermatogenesis? The production of sperm cells What is oogenesis? The production of egg cells What is the purpose of mitosis? To produce more body cells What is the purpose of meiosis? To produce sex cells Describe cytokinesis in plant cells. Cell plate forms midway between the divided nuclei What phase of meiosis does the picture represent? Anaphase 1 What phase of meiosis does the picture represent? Metaphase 1 How many cells are produced from meiosis? Are they haploid or diploid? Four haploid cells What phase of meiosis is represented in the picture? Telophase 2