1.6 cell division simple Flashcards
cell cycle stages
interphase
prophase
metaphase
anaphase
telophase
during most of the cycle what stage is it in
interphase
human chromosomes
46
how many homologous pairs do humans have
23
total number of chromones
diploid
half of diploid
haploid
where does mitosis take place in plants
meristems
tip of the root
tip of the shoot
stages of mitosis
no interphase
prophase
metaphase
anaphase
telophase
during interphase
- There is a replication of organelles such as mitochondria and chloroplasts which
have their own DNA. - New organelles are made.
- There is a synthesis of ATP and proteins.
- There is an increase in cell size.
what does mitosis produce
daughter cells that are genetically identical to parent cells
why does cell division occur
- growth
- repairing damaged cells
- replacement of old, worn-out cells
- asexual reproduction.
how are tumors formed
cell cycle is controlled by genes. If the genes that regulate the cell cycle
are damaged, uncontrolled mitosis can occur. This rapid replication of cells
can form tumours, leading to a disease called cancer. These genes that cause
cancer are called oncogene
the genes that cause cancer
oncogenes
mitosis prophase
- Chromosomes condense and become visible.
- Centrioles move to opposite sides of cell in animal cells.
- Spindle forms from
microtubules. - Nuclear envelope disintegrates
mitosis metaphase
- Centromeres of
chromosomes
attach to spindle
and line up on
the equator.
