NEET · Biology · STD 11 - 10. Cell cycle and cell division

The complex formed by a pair of synapsed homologous chromosomes is called

A bivalent
B axoneme
C equatorial plate
D kinetochore.

Verified Solution

Answer & Solution

Correct Answer

(A) bivalent

Step-by-step Solution

Detailed explanation

(a) : During zygotene stage chromosomes start pairing together and this process of association is called synapsis. Such paired chromosomes are called homologous chromosomes. Electron micrographs of this stage indicate that chromosome synapsis is accompanied by the formation of complex structure called synaptonemal complex. The complex formed by a pair of synapsed homologous chromosomes is called a bivalent or a tetrad.

Apply the relevant identity from the chapter and substitute the values established in the previous step, keeping the original constraint in view.

Use the simplified expression to isolate the unknown, then plug the result back into the question setup to confirm the working is internally consistent.

Cross-check against a boundary or limiting case. Both the dimensional balance and the qualitative behaviour at the extreme should agree with the candidate answer.

Combine the steps above to identify the correct option. The remaining choices each fail at least one of the consistency, dimensional, or boundary checks.

Same subject

Match List \(I\) with List \(II\) :

List \(I\)	List \(II\)
\(A.\) Cocaine	\(I.\) Effective sedative in surgery
\(B.\) Heroin	\(II.\) Cannabis sativa
\(C.\) Morphine	\(III.\) Erythroxylum
\(D.\) Marijuana	\(IV.\) Papaver somniferum

Choose the correct answer from the options given below:

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