+
Related Flashcards
Related Topics
Cards In This Set
| Front | Back |
|
Mitosis
|
Four stages: prophase, metaphase, anaphase, telophase, part of the cells life cycle where the nucleus is splitting (nuclear division), end up with the same amount of DNA that you started with
|
|
Somatic cells:
|
Cells of a particular species that have the same number of chromosomes (ex: humans have 46)
|
|
Meiosis:
|
Functions only in sexual reproduction
|
|
Germ Cells
|
Form in meiosis
|
|
Chromosome:
Chromatid: |
A double rod of DNA
single strand of DNA |
|
Sister chromatids:
|
Two identical chromatids connected by the centromere
|
|
Histones:
|
protein that prevents the DNA from tangling
|
|
Nucleosome
|
A nucleosome consists of part of a DNA molecule looped twice around a core of histone proteins
|
|
Centromere/kinetochores:
|
where the duplicated chromosome will attach to spindle microtubules during nuclear division
|
|
Chromosome number:
|
tells how many of each type of chromosome is present in a cell (haploid); 2n is diploid.
|
|
Cell cycle
|
Interphase, mitosis, cytokinesis
|
|
Bipolar mitotic spindle:
|
Consists of two distinct sets of microtubules
–Each set extends from one of the cell poles –Two sets overlap at spindle equator Moves chromosomes during mitosis |
|
Diploid number:
|
Two sets of chromosomes (1 from each parent)
|
|
Microtubules
|
: keep things lined up, connect to the centromere, guides chromosomes
|
|
Centrioles
|
: start outside of the nucleus, spindle fibers connected to it, then move to opposite poles during metaphase and pull the chromosomes apart
|
