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Heredity PowerPoint PPT Presentation


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Heredity. Vocabulary. Get the definitions for the following terms from your text: gene genotypegenomephenotypeallele homozygousheterozygousdominant recessive. Law of Segregation. Organisms inherit two copies of each gene, one from each parent

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Heredity

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Heredity


Vocabulary

Get the definitions for the following terms from your text:

gene

genotypegenomephenotypeallele

homozygousheterozygousdominant recessive


Law of Segregation

  • Organisms inherit two copies of each gene, one from each parent

  • Organisms donate only one copy of each gene in their gametes

  • Two copies of each gene segregate, or separate, during gamete formation


Segregation and Inheritance


Traits Studied by Mendel


Flower Color

In pea plants:

The allele for violet flower color

(B) is dominant

The allele for white flower color

(b) is recessive


Genotype vs. Phenotype


A Punnett Square


CF - AnAutosomal RecessiveTrait


Punnett Square

Carrier mother

G

g

G

GG

Gg

Carrier

father

50%

25%

g

Gg

gg

50%

25%

Child with CF


Autosomal Recessive:A Pedigree


Inheritance of an AutosomalDominant Trait


Incomplete Dominance


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