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GENES - Coggle Diagram
GENES
Every gene is a section of DNA that results in different characteristics. A trait is the characteristic that results from the protein (specific section)
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Trait
The different types of genes are called alleles which lead to different types of traits (curly hair,straight hair,blue eyes,green eyes etc)
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How we inherit genes
Each parent has two copies of genes and two different alleles. We randomly inherit one gene, which means new combinations can occur and lead to new traits.
Genetic Variability:
- Genes of the parents are randomly mixed in the creation of the offspring to create novel combinations of genes in the offspring.
- Mutations: Mutations can occur during cell division and can be caused by mutagens
Genetic Diversity:
- Evolution: The process where populations of a species change genetically over time
For evolution to occur, we need:
- Genetic variability: Individuals in a population have slightly different genetic makeup (types and combinations of genes), also known as genetic diversity
- Natural selection: The mechanism by which evolution works out (According to Charles Darwin and Alfred Wallace).
3.Sexual Selection:Choosing partners based of appearances
When there is genetic diversity, the population will be healthy because it means there are different genes around and inbreeding (bad) is less likely.
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Types of selection:
Natural selection: Survival of the fittest (whoever produces more offspring successfully will remain in that ecosystem
Sexual selection: Attraction: Females gain a preference for certain male traits that have nothing to do with survival like peacock tails
Artificial selection: Humans breed only the animals or plants with the most desirable traits, in order to exaggerate the traits through generations of breeding.
Coevolution:When two or more species interact with each other, then adaptation in one species may pressure the other to adapt as well.
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