Cell division Flashcards
Why do cells divide?
- Reproduction
- Growth of an organism
- Repair or replace lost cells
What does a genome contain?
Chromosomes
Chromatin (DNA moleucle + proteins)
Euchromatin (actively expressed part of the chromosome)
A cell’s genetic information is called its ____?
Genome
How many somatic cells do humans have?
46
Mitosis
Separates the sister chromatids into 2 chromosomes and distributes one to each daughter cell
Cytokinesis
Separates the cytoplasm
Mitotic spindle is in?
The cytoplasm
What is the longest part of the cell cycle?
Interphase (90%)
The cell cycle consists of which 2 phases?
M phase:
- Mitosis
-Cytokinesis
Interphase:
-G1
-S
-G2
What do we start with and end with?
Start: One cell with one nucleus and two copies of each chromosome
End: Two nuclei, each with one copy of each chromosome
Chromosomes are in?
The nucleus
Centrosomes are in?
The cytoplasm
What is in the way?
The nuclear envelope
Before mitosis:
Centrosomes are ________
Chromosomes are ______ but not_____
Nuclear envelope separates ______ from ________
In the cytoplasm
Already duplicated/condensed
The cytosol/the nucleus
5 stages of mitosis?
- Prophase
- Prometaphase
- Metaphase
- Anaphase
- Telophase