Only animals in the same <u>species</u> can always breed and have fertile offspring.
Although animals in the same genus<em> can </em>breed, their offspring are usually infertile.
Answer:
TT, TT, Tt, Tt
Explanation:
Putting it in a Punnett square:
T t
T TT Tt
T TT Tt
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b,d,f,e,c,a is the order in which it goes as the scientific method