What is crossing over?

Crossing over is a process that happens during meiosis and results in genetic variation in gametes. It happens between prophase and metaphase. Pairs of homologous chromosomes lined up next to each other touch at the same loci on each. These points of contact are called chiasmata. At these chiasmata, sections of the chromosomes break off and swap over, resulting in a reshuffling of genetic material. This is a completely normal biological process that is one of the reasons for every gamete to be completely genetically unique.

EB
Answered by Erin B. Biology tutor

26491 Views

See similar Biology A Level tutors

Related Biology A Level answers

All answers ▸

What is an atheroma and how do they form?


Explain how proteins are synthesised through the processes of transcription and translation.


Describe and explain how an action potential is generated


How does DNA replication work?


We're here to help

contact us iconContact ustelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

© MyTutorWeb Ltd 2013–2025

Terms & Conditions|Privacy Policy
Cookie Preferences