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Two factors that form a pair and control the alternative forms of a single contrasting character are together called what?
AChromatids
BTelomeres
CNucleotides
DAlleles
Answer & Solution
Correct answer: D. Alleles
1. A contrasting character such as tall or dwarf is controlled by a pair of factors.
2. These two factors making up one pair are called alleles.
3. One member of the pair comes from each parent.
4. So the answer is alleles, option D.
_Source: Samacheer Kalvi (TN SCERT) Class 10 Science, Unit 18 Genetics "Monohybrid Cross", p.270_
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