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4.Principles of Inheritance and Variation
medium
Alleles are
A
different molecular forms of a gene
B
heterozygotes
C
different phenotype
D
true breeding homozygotes.
(NEET-2015)
Solution
(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).
Standard 12
Biology
