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Principles Of Inheritance And Variation

Question

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Chromosome complement with 2n - 1 is called

monosomy

nullisomy

trisomy

tetrasomy

Solution

A.

monosomy

Aneuploidy is a change in the chromosme number that does not involve entire sets of chromosome. It can be of following types:

(i) Monosomic (2n - 1)

(ii) Trisomic (2n +1)

(iii) Nullisomic (2n - 2)

(iv) Tetrasomic (2n + 2)

(v) Double monosomic (2n - 1 - 1)

(vi) Doble trisomic (2n + 1 + 1)

Some More Questions From Principles of Inheritance and Variation Chapter

Name one trait that does not blend.

Give one example of genetic trait for each of the following in humans : (i) Lethality (ii) Multiple allelism.

What for symbols AA and Aa stand ?

Mention the phenomenon of pleiotropy by giving an example.

Name the plant that shows incomplete dominance in respect of the colour of its flower.

Write the genotypes of man with blood group A.

What is Mendel’s monohybrid phenotypic ratio ?

Write down Mendel’s dihybrid Phenotypic ratio

Who were the rediscoverers of Mendelism ?

What are the real determinants of what an organism will become ?

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