Home
Class 12
BIOLOGY
When synapsis is complete all along the ...

When synapsis is complete all along the chromosome, the cells are said to have entered a stage of prophase I, where exchange of genetic material takes place between homologous chromosomes. The stage is called

A

zygotene

B

pachytene

C

diplotene

D

diakinesis

Text Solution

Verified by Experts

The correct Answer is:
B
The synapsis, pairing of homologous chromosomes takes place during zygotene. Synapsis results in the formation of bivalents during zygotene. The formation of special proteinaceous structure called synaptonemal complex occur. After zygolene stage cell entered in pachytene stage in which the bivalents become spiralled, shortened and thickened.
Promotional Banner

Similar Questions

Explore conceptually related problems

When synapsis is completed all along the chromosome, the'cell is said to have entered a stage.

When synapsis is complete all along the chromosomes, the cell is said to have entered a stage called

Crossing over is the exchange of genetic material between ______chromatids of homologous chromosomes.

The exchange of genetic material between chromatids of paired homologous chromosomes during first meiotic division is called

A : Crossing over is exchange of genetic material between non-homologous chromosomes. R : it produces new linkages.

The stage during which synapsis occurs between homologous chromosomes is

Assertion: Crossing over leads to recombination of genetic material on the two chromosomes. Reason: Crossing over is the exchange of genetic material between two homologous chromosomes.

Name the stage of cell cycle at which one of the following events occur Crossing over between homologous chromosomes takes place

Name the stage of cell cycle at which one of the following events occur Pairing between homologous chromosomes takes place.

Assertion (A). Events in pachytene play a key role in evolutionary changes in organisms Reason (R) .Exchange of genetic material takes place between sister chromatids of homologous chromosomes