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What is the only way for a new species to evolve or to have new alleles in a species?
By mutations occurring
What is a mutation?
A mutation is a random change to an organism's genetic material.
Mutations can occur during fetal development or naturally through mitosis, however, they can also be caused by external environmental conditions. What is the term given to these conditions?
Mutagenic Agents
Name 2 mutagenic agents.
Chemical (Mustard gas) OR Radiation (X-rays, UV rays) OR Extreme temperatures
Having haemophilia would be considered what type of mutation?
Disadvantageous
If someone was to have 6 fingers or 6 toes, what type of mutation would they have?
Neutral
Define adaptation
An adaptation is an inheritedcharacteristic that makes an organismwell suited to survival in itsenvironment/niche.
Describe natural selection
Organisms producing more offspring than able to sustain, therefore only the best adapted will survive to adulthood and reproduce. - "Survival of the fittest"
Define speciation
Speciation is the formation of a new species by the process of natural selection after a population becomes isolated.
Describe stage 1 of speciation
An isolation barrier forms to prevent the exchange of genetic material.
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