B1- Chromosomes And Mitosis Flashcards
What do chromosomes contain?
Genetic information
Chromosomes are coiled up lengths of DNA molecules
What is the structure of chromosomes?
Coiled lengths of DNA molecules
How many copies of each chromosome do body cells normally have?
Two copies
One copy comes from the mother and one from the father
What is the purpose of the cell cycle?
To produce new cells for growth, development, and repair
What is the stage of the cell cycle when the cell divides?
Mitosis
What happens at the end of the cell cycle?
Two new cells identical to the original cell are formed
What are the two main stages of the cell cycle?
Growth & DNA replication, Mitosis
What occurs to DNA in a cell that is not dividing?
DNA is spread out in long strings
What must a cell do before it divides?
Grow and increase the amount of subcellular structures
What happens to DNA during the cell cycle before mitosis?
DNA is duplicated
What shape do chromosomes take after DNA is copied?
X-shaped chromosomes
What happens to chromosomes during mitosis?
They line up at the center of the cell and are pulled apart
What forms around each set of chromosomes after mitosis?
Membranes that become the nuclei of the two new cells
What divides last in the process of cell division?
The cytoplasm and cell membrane
The daughter cells produced by mitosis are _____ to the parent cell
Identical
