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2. Mendel's Laws of Inheritance - Part 1 of 2
2. Mendel's Laws of Inheritance / Monohybrid Cross / Problem 6

Which of the following crosses will result in 100% heterozygous offspring? 
Cross I          P:  TT × tt 
Cross II         P:  Gg × Gg 
Cross III        P:  RR × RR 
Cross IV        P:  YY × yy 

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