click below
click below
Normal Size Small Size show me how
Meiosis
Biology
Question | Answer |
---|---|
DNA replication takes place when? | interphase |
Meiosis consists of 2 cell divisions called? | meiosis I and meiosis II |
Centrosomes(aka centrioles) migrate to where? | to opposite poles of the cell |
What is the pairing of homologous chromosomes called? | synapsis |
Crossing over points are called? | chiasmata |
What happens in metaphase I? | Homologous chromosomes line up in the equator and sort independently |
What happens during anaphase? | chromosomes from each pair move to the opposite poles of the cell. The centromeres do not divide. |
What is interkinesis? | short interphase period may follow. No DNA replication |
In prophase II, each cell is a ___________? | haploid |
In metaphase II, chromosomes line up how? | in single file |
What happens during telophase II? | chromosomes decondense and nuclear membranes reform. Depending on the species, cytokinesis may occur. |
Each of the four daughter cells produced by meiosis is identical or unique? | unique |
With respect to meiosis, when does DNA replication take place? | during interphase |
When does crossing over occur? | late prophase I |
During which phase does the nuclear membrane reform around the chromosomes? | telophase I and II |
What is a diploid? | a cell with a complete set of chromosomes |
What is a zygote? | the cell formed by the union of two gametes |
What are gametes? | Biologists call both types of sex cells(sperm,egg) this name. |
What is fertilization? | when two cells merge, a sperm and an egg |
What is a haploid? | a cell with half the number of chromosomes as the parent |
What is nondisjunction? | when cells don't divide correctly |
What does tetrad represent? | the four cells produced by meiotic cell division |