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MCB 41 Lecture 26 (5/2)
Final Exam
9
Other
Not Applicable
05/08/2007

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Term
Germline mutation
Definition
Any detectable, heritable variation in the lineage of germ cells. Mutations in these cells are transmitted to offspring. Permanent changes to the DNA are passed on to subsequent generations
Term
Somatic mutation
Definition
A mutation in the somatic cell. These mutations do not get passed down to offspring.
Term
Carcinoma
Definition
A group of cancers derived from epithelial cells.
Term
Metastasis
Definition
The spread of cancer from its primary site to other places in the body.
Term
Apoptosis
Definition
This is programmed cell death that occurs after the cell has decided that it is abnormal. Apoptosis is ignored when cells become cancerous.
Term
lobular carcinoma
Definition
Breast cancer that is more rare than ductal carcinoma and starts in the lobules of the mammary glands.
Term
Ductal carcinoma
Definition
Breast cancer that starts in the epithelial cells of the breast.
Term
Cell cycle
Definition
The series of events that take place in an eukaryotic cell between its formation and the moment it replicates itself. These events can be divided in two main parts: interphase (in between divisions phase grouping G1 phase, S phase, G2 phase), during which the cell is forming and carries on with its normal metabolic functions; the mitotic phase (M mitosis), during which the cell is replicating itself. Thus, cell-division cycle is an essential process by which a single-cell fertilized egg develops into a mature organism.
Term
Cell cycle checkpoint
Definition
Checkpoints ensure the cell cycle
proceeds without errors. If there is an
unfavorable extra-cellular environment and
damaged DNA, it must be repaired before it
transitions between G1 and S. There is a
check to see if DNA is incompletely
replicated or is damaged before it goes into
mitosis.
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