Homologous chromosomes shows maximum attraction during pachytene. At this point, a tetrad of the chromosomes has formed known as a bivalent. This is the stage when chromosomal crossover occurs. Non-sister chromatids of homologous chromosomes may exchange segments over regions of homology.

Attraction of Homologous Chromosomes during Meiosis

Homologous chromosomes show attraction during zygotene stage of meiosis. Let's break down the process in detail:

Leptotene:
- During leptotene, chromosomes begin to condense and become visible under a microscope.
- Homologous chromosomes are not yet closely associated at this stage.

Zygotene:
- In the zygotene stage, homologous chromosomes start pairing up and become closely aligned.
- This pairing is called synapsis, where homologous chromosomes form structures called synaptonemal complexes that facilitate genetic recombination.
- The attraction between homologous chromosomes is crucial for the exchange of genetic material between them.

Pachytene:
- At pachytene, homologous chromosomes are completely paired and crossing over occurs.
- Crossing over is the exchange of genetic material between homologous chromosomes, leading to genetic diversity in offspring.

Diplotene:
- In diplotene, the homologous chromosomes begin to separate but remain connected at points called chiasmata where crossing over occurred.
- This stage prepares the chromosomes for the next phases of meiosis.

In conclusion, the attraction of homologous chromosomes during meiosis, particularly during zygotene, plays a crucial role in genetic recombination and the generation of genetic diversity in sexually reproducing organisms.