Chapter 6: Cell Division

cell cycle

sequence of events over the life span of a eukaryotic cell that will divide

interphase and cell division

stages of cell division

G1, S, G2

phases of interphase

s phase

DNA is replicated in this stage

G0

phase that cells that will not divide exit the cell cycle into

mitosis and cytokinesis

stages of eukaryotic cell division

binary fission

asexual reproduction for prokaryotes

prophase, metaphase, anaphase, telophase

phases of mitosis

homologous chromosome pair

2 of the same kind of chromosome, one from each parent

sister chromatids

chromosomal replication produces

centromere

site at which sister chromatids are held together

gametes

sex cells

zygote

gametes that fused during fertilization

haploid

having only one chromosome from each homologous chromosome pair

diploid

having both chromosomes from each homologous chromosome pair (one from each parent)

meiosis I

maternal and paternal members of each homologous pair are sorted into 2 daughter cells during meiosis

meiosis II

sister chromatids are segregated into separate daughter cells during meiosis

crossing-over

physical exchange of chromosomal segments between homologous chromosomes leading to genetic recombination during meiosis I

independent assortment

random distribution of the homologous chromosomes into daughter cells during meiosis I