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GeneticS. By: Arley Wells. What is genetics?. Genetics is the study of heredity, or what makes organisms differ from one another… the transmission of characteristics from one generation to the next… and changes based on heredity. Where did the word come from?.

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By arley wells l.jpg

GeneticS

By: Arley Wells


What is genetics l.jpg

What is genetics?

  • Genetics is the study of heredity, or what makes organisms differ from one another…

  • the transmission of characteristics from one generation to the next…

  • and changes based on heredity.


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Where did the word come from?

Genetics is based on the word gene.

What is a gene?

It is a basic unit of heredity.


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  • Each gene directs the development of one ormore traits.

  • Each gene represents one discrete section of one chromosome. (one single strand of DNA)

  • There are many different versions.

  • Each different version is called an allele.


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Population Genetics

  • …is the study of how genetic principles apply to the entire population.

  • Population genetics has to take into account ecological and evolutionary factors such as population size, migration patterns, and mating selection.


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Inbreeding:

Why is it bad?

  • Inbreeding is bad because it mixes two genetic structures of the same gene pool and causes the variance to be limited.

  • Not for the baby. It’s been known to happen that most babies born under same family relatives have had bad coloring, speech and hearing disorders.

Is it safe?


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Definitions

  • gene pool: the total genetic information present in all members of a population or series

  • gene flow: the exchange of genetic information among populations as a result of migration

  • genetic variance: variance in allele frequency among samples taken from a population or among sub populations


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