Recombination nodules

Definition

Recombination nodules are protein complexes that form on the synaptonemal complex during prophase I of meiosis. They facilitate the exchange of genetic material between homologous chromosomes through crossing over.

5 Must Know Facts For Your Next Test

1. Recombination nodules appear during the pachytene stage of prophase I.
2. They are essential for genetic diversity in sexually reproducing organisms.
3. Each nodule is associated with a crossover event between homologous chromosomes.
4. Recombination nodules consist of multiple proteins, including those involved in DNA repair and recombination.
5. Their presence ensures proper chromosome segregation by promoting homologous recombination.

Related terms

Synaptonemal Complex: A protein structure that forms between homologous chromosomes during meiosis and supports their alignment and recombination.

Crossing Over: The process where homologous chromosomes exchange genetic material during meiosis, facilitated by recombination nodules.

Homologous Chromosomes: Chromosome pairs, one from each parent, that have similar structure and gene sequences.