alleryWhich pair of alleles correctly represents a homozygous condition?
ATT
BTt
CtT
DTt mixed
Answer & Solution
Correct answer: A. TT
1. Homozygous means an organism carries two identical alleles for a gene.
2. TT carries two dominant alleles, both T.
3. Tt and tT carry one dominant and one recessive, which is heterozygous.
4. tt also counts as homozygous (recessive), but only TT appears in the options as homozygous.
5. So among the given choices, TT is the homozygous one.
6. Hence the correct answer is TT.
_Source: syllabus Science Ch 9 'Heredity' (learncbse.in extract)_
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