How does crossing over add to the genetic diversity of sexually reproducing organisms?

Question

thomaster · Answer

take a look at this image:

thomaster · Answer

all the traits get mixed up. That's how genetic diversity arises :)

anonymous · Answer

During the crossing over that occurs in prophase I, sister chromatids within each tetrad attach and swap portions of adjacent DNA molecules. Neither chromatid gains or loses any genes, but this crossing over increases the genetic variation in the sex cells.

anonymous · Answer

does it involve segments of two homologous chromosomes trading places
or random segregation of homologous chromosomes to each daughter cell or fertilization of an ovum by any one out of millions of sperms?

anonymous · Answer

I think that it is two homologus chromosomes trading places but i am not sure......

anonymous · Answer

okay thank you :)

anonymous · Answer

Your welcome :)