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STD 12 - 4. principal of inheritance and variation — BIOLOGY STD 12 Science — Question

Rajasthan BoardEnglish MediumSTD 12 ScienceBIOLOGYSTD 12 - 4. principal of inheritance and variation1 Mark
MCQ
Alleles are
  • ✓
    different molecular forms of a gene
  • B
    heterozygotes
  • C
    different phenotype
  • D
    true breeding homozygotes.
✓

Answer

Correct option: A.
different molecular forms of a gene
a
(a): Genes are the units of inheritance and contain the information that is required to express a particular trait in an organism. Alternating forms of a single gene which code for a pair of contrasting traits are known as alleles. For example, two alleles determine the height of pea plant (tall and dwarf).

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