A TT genotype is said to be _____. homozygous heterozygous dihybrid

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Accepted Answer

Homozygous. You can tell in future that if both letters are either lowercase or upper case (e.g. TT or tt) the answer is always HOMOzygous. If the letters are different cases (e.g. Tt or tT) the answer is always HETROzygous. This is because 'homo' means 'same' and 'hetero' means 'different'.

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