Lab Exam 2: Meiosis and Mitosis Flashcards
interphase
longer period in which the cell grows and carries out its usual activities
what is another name for the mitotic phase?
cell division
mitotic phase
period when the cell reproduces itself by dividing
cell division is essential for…
growth and repair
2 events in the M (mitotic) Phase
mitosis and cytokinesis
division of the cytoplasm
cytokinesis
division of the copied DNA of the mother cell into 2 daughter nuclei
mitosis
product of meiosis
yields four daughter nuclei that differ genetically in composition from mother nucleus, production of gametes
4 phases of mitosis
prophase, metaphase, anaphase, telophase
interphase
- cell carries out normal metabolic activities
- not part of mitosis
- DNA is in form of chromatin
- nuclear envelope in tact and visible
- 3 phases
3 periods of interphase
G1, S, G2
G1 phase in interphase
centrioles begin replicating
S phase in interphase
DNA replicated
G2 phase in interphase
final preparations for mitosis completed, centrioles finish replicating
prophase
- chromatin condenses forming chromosomes
- nuclear envelope breaks up
sister chromatids held together by
centromere
centrosomes are focal point of
mitotic spindle
metaphase
centrosomes at opposite poles of cell
- chromosomes line up in middle, metaphase plate
anaphase
chromosomes now V shaped
start to pull to opposite sides of the cell
telophase
chromosomes uncoil into chromatin
nuclear envelope forms
cytokinesis
begins in late anaphase
ring of actin forms cleavage furrow pinching cell apart
