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Principles of Inheritance and Variation

Short Answer Type

51. What are types of linkage ?

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52. Explain Linkage Group.

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53. Differentiate between :

Complete linkage and incomplete linkage

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54. Define sex-linked genes?

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One Word Answers

55. Give the name for the Trisomy of 21^stchromosome in humans.

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Short Answer Type

56. Why is a man unable to pass on a X-linked trait to his son ?

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57. What do you understand by the term recombination ?

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Long Answer Type

58.

How is sex determined in human beings?

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59.

What is pedigree analysis? Suggest how such an analysis can be useful?

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Short Answer Type

60. What are mutations ? Define.

Mutations. Mutation is the phenomenon which results in the modification or alteration of the DNA sequences which in turn affect the genotype or phenotype of the organism.These include changes in gene or chromosomes structure or number .

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