GENETIC CROSSES

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GENETIC CROSSES

• THE MONOHYBRID CROSS
• THE DIHYBRID CROSS

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First Set up the Parental Cross P 1

• A axial flowers Male
• a terminal flowers Female
• AA X aa

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SET UP THE PUNNETT SQUARE
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Put the Alleles in Separate Boxes
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A Monohybrid Cross
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Now Perform an F1 Cross

• A axial flowers Male
• a terminal flowers Female
• F1 First Offspring
• Aa X Aa

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Put the Alleles in Separate Boxes
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Perform the Cross
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Assess The Genotype and Phenotypes

• GENOTYPES
• AA 1
• Aa 2
• aa 1
• Ratio 121

• PHENOTYPES
• Axial Flowers (AA, Aa) 3
• Terminal Flowers (aa) 1
• Ratio 31

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Assess The Genotype and Phenotypes

• PHENOTYPES
• Axial Flowers 3
• Terminal Flowers 1
• Ratio 31

• GENOTYPES
• AA 1
• Aa 2
• aa 1
• Ratio 121

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First Set up the Parental Cross P 1

• . F flying f walking
• P purple p orange
• FFPP X ffpp
• MALE FEMALE

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PARENTAL P1DIHYBRID CROSS
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PARENTAL P1DIHYBRID CROSS
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• . F flying f walking
• P purple p orange
• Do the F1 cross
• FfPp X FfPp
• Be sure you choose one of EACH type of allele

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F2DIHYBRID CROSS
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F2DIHYBRID CROSS
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F2DIHYBRID CROSS
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F2DIHYBRID CROSS
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F2DIHYBRID CROSS
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F2DIHYBRID CROSS
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F2DIHYBRID CROSS