Deviations of Mendelian ratio include incomplete penetrance, late manifestation, gene-gene interaction (epistasis), Linkage, variable expression and lethal alleles.
polygenic inheritance is when more than one genes are responsible for a character/phenotype. for example human skin color. if one want to draw a pedigree for that, he will not be able to succeed....
The "principle patterns" of inheritance are based on Mendel's three Laws- Independent Assortment, Random Segregation, and Dominance. Of course, these have been modified by what has been found out in...
Inheritance pattern for most forms of SMA is autosomal recessive, meaning that both parents are carriers of the disorder, and the chance of having a child affected with the disorder is 25% with each...
There are lots of ways. A simple way is to do a Punnett Square. It's useful in studying independent inheritance patterns (multiple traits that are not on the same chromosome).