Natural Selection and Genetic Variations

The passing on of characteristics from parents to offspring

• genetics

• inherited traits

• heredity

• genotype

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The study of heredity

• genetics

• heredity

• alleles

• genes

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     chemical factors that determine traits

• inherited traits

• genes

• alleles

• heredity

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     two different versions of a gene

Inherit 1 allele from mom and 1 from dad = gene

• alleles

• genes

• inherited traits

• genetics

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Characteristics that are inherited, features are passed from one generation to the next

• heredity

• genetics

• inherited traits

• genes

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Father of genetics

First to succeed in predicting how traits would be transformed from one generation to the next

   Used pea plants

     Crossed a tall plant with a short plant

• Gregor Mendel

• Howie Mendel

Way an organism looks and behaves

-Physical characteristics

-Examples: height (tall or short), skin color (red, white, blue...etc), head size, eye color etc.

• heterozygous

• homozygous

• genotype

• phenotype

Allele combination and organism contains

                -Genetic makeup

                -Assigned a letter to represent the trait

                 Examples: TT, Tt, tt

• phenotype

• genotype

• heterozygous

• homozygous

Natural selection acts on _______ in a population

• phenotypes

• genotypes

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·      Genetic variation come from _____ main sources

• 1

• 2

• 3

• 4

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