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)_
Keep practising Heredity and Evolution
Browse all Heredity and Evolution questions for Andhra Pradesh SSC (Class 10), or explore more Science topics.
Related questions
Evolution is best defined as the change occurring in living organisms that takes place:Which genetic disorder is given as an example of a condition that can be caused by a mutatA sudden change in a gene, such as a nucleotide shifting its position, is known as a:The stepwise movement of the ribosome along mRNA by a distance of one triplet codon is terThe amino acids brought in by tRNA are joined together by peptide bonds with the help of wOn a tRNA molecule, the sequence that is complementary to the codon on mRNA is called the:Which Indian-origin scientist received the 1968 Nobel Prize for his work on triplet codonsHow many nucleotides make up the triplet codon that codes for a single amino acid?