Biology / Unit 5 Bio 0965 short lesson, about 20 seconds
Prophase I: Synapsis and the Synaptonemal Complex
Captions available
The idea
In prophase I, homologous chromosomes pair tightly through synapsis, held together by a protein lattice called the synaptonemal complex.
In practice
A maternal and paternal homolog align gene-for-gene along their length, zipped together by the synaptonemal complex.
Where people slip
Synapsis pairs homologous chromosomes, not sister chromatids — those are already joined from replication.
Your place on the trail
Every lesson rests on earlier ones and opens later ones. Tap any to jump.
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