In this article we will discuss about the genotype and phenotype variations of corolla in plants. East in 1910, 1916 performed experiments on flower length in Nicotiana longiflora. He took two homozygous, pure breeding lines differing in flower length, one having 41 cm the other 93 cm for average length of corolla. The minor variations in flower length within a [...]
The below mentioned article provides note on multiple alleles. After Mendel first advocated the existence of two factors for each character, it was demonstrated in many organisms that a gene consists of a pair of alleles. Each member of the pair of alleles is said to occupy an identical position or locus on each of the two homologous chromosomes in [...]
In this article we will discus about the blood group alleles in man. The ABO blood group system in man provides an excellent illustration of a multiple allelic system. If blood from two persons is allowed to mix outside the body, sometimes it will mix well, at other times there is clumping (agglutination) of red blood cells. The reason for [...]