Below is a list of examples for the different genetic combinations that can be created during breeding. Here, ‘wt’ represents the normal allele (wild-type), and ‘mut’ represents the mutant allele. The given percentages are the chances that each individual offspring has on obtaining a particular genotype. The actual phenotype of these combinations, depends on the mode of inheritance.
Autosomal genes
- mut/mut x mut/mut
- 100% mut/mut
- wt/wt x mut/mut
- 100% wt/mut
- wt/wt x wt/mut
- 50% wt/wt
- 50% wt/mut
- wt/mut x mut/mut
- 50% wt/mut
- 50% mut/mut
- wt/mut x wt/mut
- 25% wt/wt
- 50% wt/mut
- 25% mut/mut
X-Linked genes
Males only have a single X-chromosome, and therefore will only have a single copy of an X-linked gene. Males below are depicted as having a “Y” in the place of the missing allele.
- Y/wt x wt/mut
- 25% Y/wt
- 25% Y/mut
- 25% wt/wt
- 25% wt/mut
- Y/mut x wt/mut
- 25% Y/wt
- 25% Y/mut
- 25% wt/mut
- 25% mut/mut
- Y/wt x mut/mut
- 50% Y/mut
- 50% wt/mut
- Y/mut x mut/mut
- 50% Y/mut
- 50% mut/mut
