Class 12 biology Principles of Inheritance and Variation Free test quiz

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Time: 10 Minutes for 10 Question.


12th Biology: Principles of Inheritance and Variation

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1. Conditions of a karyotype 2n ± 1 and 2n ± 2 are called

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2. A pleiotropic gene

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3. All genes located on the same chromosome

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4. The allele which is unable to express its effect in the presence of another is called

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5. The distance between the genes is measured by

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6. Two crosses between the same pair of genotypes or phenotypes in which the sources of the gametes are reversed in one cross, is known as

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7. Crossing over in diploid organism is responsible for

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8. RR (red) Antirrhinum is crossed with WW (white) one. Offspring RW are pink. This is an example of

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9. In a dihybrid cross AABB x aabb, F2 progeny of AABB, AABb, AaBB and AaBb occurs in the ratio of

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10. Extranuclear inheritance occurs in

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1Prabavathy90 %9

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