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Select the incorrect match :

  • Option 1)

    Submetacentric chromosomes - L - shaped chromosomes

  • Option 2)

    Allosomes - Sex chromosomes

  • Option 3)

    Lampbrush chromosomes - Diplotene bivalents

  • Option 4)

    Polytene chromosomes - oocytes of amphibians

 

Answers (1)

As we learnt in

Diplotene -

The fourth stage of prophase I, marked by dissolution of synaptonemal complex and the tendency of the recombined homologous chromosomes of the bivalents to separate. The X-shaped structures are called chiasmata.

 

- wherein

Diplotene

 

 

Types of chromosomes -

Based on the position of centromere, the chromosomes can be classified into four types:

1) Metacentric chromosome- middle centromere forming two equal arms.

2) Sub-metacentric- centromere slightly away from the center.

3)Acrocentric- centromere is situated close to its end 

4)Telocentric- terminal centromere

 

- wherein

 

 

Polytene chromosomes are found in salivary glands of insects of order Diptera.


Option 1)

Submetacentric chromosomes - L - shaped chromosomes

Incorrect

Option 2)

Allosomes - Sex chromosomes

Incorrect

Option 3)

Lampbrush chromosomes - Diplotene bivalents

Incorrect

Option 4)

Polytene chromosomes - oocytes of amphibians

Correct

Posted by

Vakul

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