What is reproductive isolation in biology?

What is reproductive isolation, pre and post zygotic barriers?What is reproductive isolation in biology?
Reproductive isolation is a barrier which doesn't allow species to reproduce together even though there might not e a physical barrier. Pre zygotic barriers are things that happen before the baby is born such as lack of nutrients causing the fetus or whatever to die. Post zygotic happens after the baby is born and it can be dying at a young age, or even growing to full age, but being unable to reproduce.What is reproductive isolation in biology?
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Reproductive isolation is when two populations of organisms are some how prevented from interbreeding and exchanging genes.





Pre-zygotic barriers are some times called ';fertilization barriers'; and are anything that prevents sperm and ovum from getting together. This could be a physical barrier like a river or mountain range that the members of both populations cannot cross. Or it could be a sexual preference like the females only mating with males that have blue spots and never with males that have brown spots. It could even be the shape and size of the animals' genitalia (especially common barrier in insects).





Post-zygotic barriers are sometimes called ';hybrid barriers'; and are anything that happens after fertilization. This could be chromosome incompatibilities so that the fertlized egg never even divides and turns into an embryo. Or it could be a fully healthy offspring that survives to adulthood but is sterile.
where u isolate yourself because nobody will reproduce with you