What are the exceptions to the $-$
Law of dominance
Law of independent assortment
- Law of segregation
Exception of law of dominance:
In incomplete dominance when a red snapdragon flowered plant is crossed with a white flowered plant an intermediate phenotype appears in the F1 hybrid instead of a parental phenotype.
Unlike dominance in codominance when a A ($I^AI^A$) blood group individual mates with B ($I^BI^B$) blood group individual the offsprings have blood group AB ($I^AI^B$) instead of A or B.
Exception of law of segregation:
During meiosis homologous chromosomes/sister chromatids and hence genes may move to a common gamete violating law of segregation.
Exception of law of independent assortment:
When genes are present on the same chromosome they tend to remain together and enter into the same gamete. This is the reason behind deviation of dihybrid test cross ratio from 1:1:1:1 and occurrence of parental combination in high frequencies.
Am I correct? Are there any more exceptions to these laws?