What type of material is exchanged during "crossing over"?

gentic materal

Explanation:

Alleles are swapped when crossing over

Chromosomal crossover, or crossing over, is the exchange of genetic material between two homologous chromosomes non-sister chromatids that results in recombinant chromosomes during sexual reproduction.

Explanation:

if you look up in the top right corner you'll see your current profile picture, click than click "view profile" you'll be able to change it there.

fossil's are like over rated rocks like low key not gonna lie i don't get why we can't just call them old rocks like for real i mean i call my grandpa and grandma that smh