Write short note on 'Mendelian and non-Mendelian traits':-
Ans :
Categorising patterns of inheritance as Mendelian and non-Mendelian should be based on genotypic ratios, not phenotypic ratios, in offspring.
1)Genotypic ratios reflect the segregation and independent assortment of alleles during Meiosis in parents , which are the underpinning of Mendel's Laws.
2)Phenotypic ratios reflect the modes of action of the gene products and the relationship between alleles in offspring.
Mendel developed the principles of segregation, independent assortment, and dominance based on his studies of 7 traits in peas, including flower colour, pea colour , and pear shape
Some examples of non-Mendelian inheritance :
1)Genes that reside in the genomes of mitochondria and chloroplasts display non-Mendelian inheritance.
2)Organelle transmission does not follow Mendel's Laws, the genes in organelles do not display Mendelian inheritance.
3)Epigenetic inheritance provides another example of non-Mendelian inheritance.
The Basis of Non-Mendelian Heredity: -
Non-Mendelian heredity is a term used to describe inheritance patterns that do not fit the classical Mendelian inheritance model, which allows breeders to create new varieties of plants with desired characteristics in a different way.
