Definition

A specific stage in the first division of meiosis where chromosomes become thicker and shorter, and crossing-over occurs between paired chromosomes.

Example

During the pachytene stage, genetic material is exchanged between homologous chromosomes, increasing genetic diversity.

Conversation

Did you learn about the pachytene stage in biology class?

Yeah, it’s fascinating how chromosomes get thick and short during that phase.

I found it interesting that crossing-over happens in pachytene too.

Definitely! It’s crucial for genetic diversity.

Synonyms & Antonyms

Root Explanation

Pachytene → It is formed from "pachys" (from Greek "pachys", meaning thick) and "tene" (from Greek "tenē", meaning thread). The word "pachytene" refers to the stage in meiosis where chromosomes become thickened and visible as threads.

Memory Tip

Think of 'thick' ('pachys') threads ('tenē') to remember that 'pachytene' describes the stage when chromosomes appear thick and visible.

Visually Confused Words