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If a homozygous recessive trait (tt) is crossed with another homozygous recessive individual (tt), what is expected in the offspring?

Question
If a homozygous recessive trait (tt) is crossed with another homozygous recessive individual (tt), what is expected in the offspring?
All offspring will show the dominant trait
All offspring will be tt, showing the recessive trait
Offspring will show a 3:1 ratio
Offspring cannot be predicted at all
Answer
All offspring will be tt, showing the recessive trait
Detailed Explanation
Crossing tt x tt produces all tt offspring, since only the recessive allele is available from both parents, so all offspring show the recessive trait.
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