Cell Division Flashcards
Cell Continuity
Cells develop from pre-existing cells
Chromosomes
Coiled threads of DNA and protein that become visible in the nucleus at cell division
Chromatin
Elongated Chromosomes
Gene
A section of DNA that controls the formation of protein
Haploid cell (n)
A cell with only one set of chromosomes
e.g eggs and sperm
diploid cell (2n)
A cell with two sets of chromosomes
e.g nerve cells and muscle cells
homologous pair
two chromosomes of similar size with the same set of genes
Cell cycle
Changes that take place between periods of cell division
Interphase
the phase in the cell cycle when the cell isn’t dividing
Mitosis
when one nucleus divides into two, each with the same number of chromosomes and types of genes
Function of Mitosis
Unicellular- increases the number of individuals and is used for reproduction
Multi-cellular- responsible for growth and repair
Cancer
certain cells lose their ability to control the rate of mitosis and amount of times it takes place
benign tumours
the cells stop dividing, they aren’t life threatening e.g warts
malignant tumour
cells grow uncontrollably and spread to different sites
metastasis
the movement of malignant cells
