mitosis Flashcards
What are the two types of cell division in eukaryotic cells
Mitosis and meiosis
Why is mitosis needed
Olfor the growth of multicellular organisms and for repairing damaged tissues
In mitosis what does a parent cell divide to produce
Two genetically identical daughter cells
What do the two daughter cells contain
An exact copy of the DNA of the parent cell
What is the cell cycle in order
Mitosis,gap phase 1,synthesis,gap phase 2
What is interphase in the cell cycle
A period of cell growth and DNA replication
What is happening in gap phase 1
The cell grows and new organelles and proteins are made
What happens in synthesis
Cell replicates it’s DNA ready to divide by mitosis
What happens in gap phase 2
Cell keeps growing and proteins needed for cell division are made
What are the three seperate growth stages interphase is divided into
G1,S,G2
What are all the stages of mitosis
Prophase,metaphase,anaphase and telophase
What happens during interphase
The cell carries out it’s normal functions,but also prepares to divide.the cells DNA is unravelled and replicated,to double it’s genetic content.
The organelles are also replicated so it has spare ones,and it’s ATP content is increased
What happens during prophase
The chromosomes condense,getting shorter and fatter.
Tiny bundles of protein called centrioles start moving to opposite ends of the cell,forming a network of protein fibres across is called a spindle
What happens to the nuclear envelope in prophase
It breaks down and chromosomes lie free in the cyctoplasm
What happens in metaphase
The chromosomes line up along the middle of the cell and become attached to the spindle by their centromere
