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Grade 9 Punnett Squares & Crosses Worksheet

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Punnett Squares & Crosses

Grade 9 · Science
  • 1.In a cross between a homozygous dominant parent (AA) and a homozygous recessive parent (aa), what fraction of offspring will show the dominant trait? 
  • 2.In a cross between a heterozygous parent (Aa) and a homozygous recessive parent (aa), what is the expected ratio of dominant to recessive offspring? 
  • 3.In a cross between two heterozygous parents (Aa × Aa), what is the phenotype ratio of dominant to recessive offspring? 
  • 4.What tool is used to predict the possible gene combinations of offspring from a cross? 
  • 5.In a cross between a homozygous dominant parent (AA) and a homozygous recessive parent (aa), what fraction of offspring will show the dominant trait? 
  • 6.In a cross between a homozygous dominant parent (AA) and a homozygous recessive parent (aa), what fraction of offspring will show the dominant trait? 

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