DNA mutation

Multiple mutations at the same position in a DNA sequence can confound calculations of evolutionary time.

dna mutation,dna sequence,evolutionary time,mutations

  • ID: 15609
  • Source: DNALC.DNAi

Related Content

15979. A mitochondrial DNA sequence

Human mitochondrial DNA is 16,569 base pairs in length.

  • ID: 15979
  • Source: DNAi

15980. Accumulating mutations

Mutations are the grist of evolution, and have accumulated in our DNA over time. When populations separate, each group accumulates their own unique set of DNA mutations.

  • ID: 15980
  • Source: DNAi

15978. Mitochondrial DNA: a closer look

DNA found in the mitochondrion of a cell differs in structure and is separate from the DNA found in the cell nucleus. Mitochondrial DNA, or mtDNA, exists as a circular loop of double-stranded DNA rather than the linear form found in nuclear DNA. However,

  • ID: 15978
  • Source: DNAi

15977. Maternal inheritance

Unlike nuclear DNA, mtDNA is  inherited solely from the mother. (Mitochondria are predominantly from the mother’s egg and not from the father’s sperm.) Therefore, mtDNA sequences or orders of nucleotides generally remain constant over many generation

  • ID: 15977
  • Source: DNAi

15881. Defining the gene

Seymour Benzer was able to map mutations within one phage gene and correlate the mutations with protein changes. This showed that the DNA sequence of a gene was aligned with protein sequence.

  • ID: 15881
  • Source: DNAi

15168. Accumulating DNA mutations through time, Mark Stoneking

Geneticist Mark Stoneking talks about the difficulties of measuring time by mutations.

  • ID: 15168
  • Source: DNAi

15529. Radiation can cause DNA mutations, 3D animation with narration

Mutations and the molecular clock.

  • ID: 15529
  • Source: DNAi

15178. Mitochondrial DNA and the molecular clock, Douglas Wallace

Geneticist Douglas Wallace explains a method of mapping a population's history using the mutations accumulated by its members.

  • ID: 15178
  • Source: DNAi

15092. Studying the Y chromosome to understand population origins and migration, Michael Hammer

Evolutionary geneticist Michael Hammer speaks about the markers used to analyze DNA variation in the Y chromosome.

  • ID: 15092
  • Source: DNAi

15608. Human/Neandertal/Chimp mutation evoluton tree

Mutations in our DNA can be used to trace the relationships between different populations and species.

  • ID: 15608
  • Source: DNAi