In Snapdragon, A cross between true breeding red flower (RR) pla

Subject

Biology

Class

CBSE Class 12

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 Multiple Choice QuestionsShort Answer Type

1.

Name the part of the flower which the tassels of the corn-cob represent.

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2.

Mention any two contrasting traits with respect to seeds in pea plant that were studied by Mendel.

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3.

Why is secondary immune response more intense than the primary immune response in human?

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4.

Why is it not possible for an alien DNA to become part of a chromosome anywhere along its length and replicate normally?

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5.

State the role of C-peptide in human insulin.

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6.

Name the enzymes that are used for the isolation of DNA from bacterial and fungal cells for recombinant DNA technology.

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7.

State Gause's Competitive Exclusion Principle.

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8.

Name the type of association that the genus Glomus exhibits with higher plants.

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9.

Why are the human testes located outside the abdominal cavity? Name the pouch in which they are present.

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10.

In Snapdragon, A cross between true breeding red flower (RR) plants and true breeding white flower (rr) plants showed a Progeny of plants with all pink flowers.

(a)The appearance of pink flowers is not known as blending. Why?(b)What is the phenomenon known as?


(a) The appearance of pink color is not caused as blending because the alleles do not mix or blend and they maintain their originality and reappear in F2 generation. The pink color appears just because the Dominant allele is not completely dominant over the recessive allele for colour.

(b) The phenomenon is called incomplete dominance.

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