Nope.
And chances of finding the right ones to pair up would be a total crap shoot, being that a double het offspring bred back to the single het parent, will only produce the recessive trait in that parent.
You would need to breed the offspring to each other.
Double hets bred to each other, you may get a double homozygous recessive... but a double het recessive bred to a normal offspring will give you possible hets (but you would not know by looking at them).
Bruce









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