can we go over translocation and all those things that can increase variation/ mutations (ie. translocation of the SRY gene specifically maybe?)
Ya I’m confused about that too
Crossing over can increase variation, but it also can cause mutations.
Failures in crossing over:
- Deletion = only one chromosome crosses over
- Duplication = one chromosome has duplicate genes (when deletion happens, the other chromosome will have duplicate genes)
- Inversion = gene sequence inverted
- Translocation = crossing over between non-homologous pairs (ex. chromosome #1 crossing over with chromosome #20 instead of #1 crossing over with #1)
- Fusion and splitting of genes
Edit: SRY translocation specific case
The SRY gene is the sex-determining region for males on the tip of the Y chromosome. In SRY translocation, this section is crossed over to the X chromosome, causing a male to have XX traits.