What are true breeding organisms (pure breeding?

What does a dihybrid cross of two contrasting pure-breeding organisms do?

  • Answer:

    It creates heterozygous offspring. For example - the cross RRDD X rrdd would be expected to produce 100% RrDd offspring. This is because the only gamete produced by the first parent would be RD, and the only gamete produced by the second parent would be rd.

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