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Principles of Inheritance and Variation — BIOLOGY STD 12 Science — Question

Maharashtra BoardEnglish MediumSTD 12 ScienceBIOLOGYPrinciples of Inheritance and Variation5 Marks
Question
Explain why a recessive allele is unable to express itself in a heterozygous state.
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Answer

The alleles are present on homologous chromosomes.
The recessive allele does not code for its product or codes for a defective product.
The other allele remains normal and thus expresses itself.

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