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Related Concept Videos

Mismatch Repair01:20

Mismatch Repair

Organisms are capable of detecting and fixing nucleotide mismatches that occur during DNA replication. This sophisticated process requires identifying the new strand and replacing the erroneous bases with correct nucleotides. Mismatch repair is coordinated by many proteins in both prokaryotes and eukaryotes.
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Mutation, Gene Flow, and Genetic Drift01:09

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In a population that is not at Hardy-Weinberg equilibrium, the frequency of alleles changes over time. Therefore, any deviations from the five conditions of Hardy-Weinberg equilibrium can alter the genetic variation of a given population. Conditions that change the genetic variability of a population include mutations, natural selection, non-random mating, gene flow, and genetic drift (small population size).
Cancers Originate from Somatic Mutations in a Single Cell02:21

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Cancer arises from mutations in the critical genes that allow healthy cells to escape cell cycle regulation and acquire the ability to proliferate indefinitely. Though originating from a single mutation event in one of the originator cells, cancer progresses when the mutant cell lines continue to gain more and more mutations, and finally, become malignant. For example, chronic myelogenous leukemia (CML) develops initially as a non-lethal increase in white blood cells, which progressively...
Cancers Originate from Somatic Mutations in a Single Cell02:21

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Natural selection—probably the most well-known evolutionary mechanism—increases the prevalence of traits that enhance survival and reproduction. However, evolution does not merely propagate favorable traits, nor does it always benefit populations.

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Updated: May 15, 2026

Generation and Isolation of Cell Cycle-arrested Cells with Complex Karyotypes
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Published on: April 13, 2018

Genetic instability: tipping the balance.

A Janssen1, R H Medema

  • 11] Division of Cell Biology, Netherlands Cancer Institute, Amsterdam, The Netherlands [2] Department of Medical Oncology and Cancer Genomics Center, University Medical Center Utrecht, Utrecht, The Netherlands.

Oncogene
|December 19, 2012
PubMed
Summary
This summary is machine-generated.

Tumor cells exhibit significant genetic divergence from normal cells due to mutations and chromosomal aberrations. This genetic instability impacts cancer driver identification and therapeutic response prediction.

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Area of Science:

  • Genetics
  • Cancer Biology
  • Genomics

Background:

  • Tumor cells possess genomes divergent from normal cells.
  • Genetic alterations include mutations, deletions, insertions, and chromosomal aberrations.
  • Tumor genetic diversity complicates cancer driver identification and treatment response prediction.

Purpose of the Study:

  • To review mechanisms causing gross chromosomal aberrations in tumor cells.
  • To discuss the impact of these aberrations on tumor cell viability.

Main Methods:

  • Literature review of genetic alterations in cancer.
  • Analysis of mechanisms leading to chromosomal aberrations.
  • Discussion of the functional consequences of these aberrations.

Main Results:

  • Tumorigenesis involves extensive genomic changes, including gross chromosomal aberrations.
  • Genetic instability allows tumor adaptation but can also impact viability.
  • Mechanisms driving chromosomal aberrations are diverse and contribute to cancer complexity.

Conclusions:

  • Gross chromosomal aberrations are a hallmark of cancer cells.
  • Understanding these aberrations is crucial for deciphering cancer biology and developing targeted therapies.
  • The interplay between genetic alterations and tumor cell viability warrants further investigation.