Transcript General Genetics - Thunder Data Systems

General Genetics
Cayla Doner
Science
December 15th –16th
Incomplete Dominance
 This is when one gene does not completely
hide the other gene.
 It is also known as blending.
Incomplete Dominance
 An example is a
female white mouse
and a male black
mouse producing a
gray mouse.
Mendelian Inheritance
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Gregor Mendel studied traits passed from generation to
generation in pea plants such as height, color, and shape.
Medelian principles of heredity:
Traits are controlled by alleles, which are types of cells.
Alleles are either dominant or recessive.
Alleles on chromosomes are spread out onto different
sex cells.
Mendelian Inheritance
 Here are some
traits Mendel
found in pea
plants.
Multiple Alleles
 Multiple alleles are
different forms of the
same gene.
 Multiple alleles=more
than 2 forms of the same
gene in that population.
 For example: blood type:
there are a total of six
alleles= 3 from the mother
and three from the father.
Polygenic Inheritance
 Polygenic traits=more
than one gene
contributes to the
phenotype.
 Polygenic inheritanceThe inheritance of
traits are passed form
parents to offspring.
Polygenic Inheritance
 When a TRAIT is accompanied by a
combination of GENES, rather than by a
single gene.
 Height, skin color, and eyes are a few
examples of polygenic inheritance.
 It also occurs in wheat color and production
of milk in cows.
The End