B. Covalent (Bond) I hope this helps! ^^
I believe the answer is three
<span>Additional facts:
A test cross between an organism whose genotype for a certain trait is unknown and an organism that is homozygous recessive for that trait so the unknown genotype can be determined from that of the offspring.
Answer:
You'd use it when you wish to see if the one that you think is a homozygous dominant is a purebred, because if you did get a recessive offspring then it proves that the animal is a heterozygous and not a purebred.</span>
The answer is actually
<em>increased variation in tail feather color because the selection pressure has been relieved</em>
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<em>Good luck!</em>
<em>-RxL</em>
