344 EXPERIMENTAL STUDY OF INHERITANCE 



Let us take the case of pea-plants with the quality of tallness 

 or dwarfness, of round seeds or angular seeds, of coloured seed- 

 coats or white seed-coats, of yellow or green cotyledons, or of 



G. 



5- 



FlG - 35- Diagram illustrating segregation of germ-cells. 



D 1 , dominant parent, its ancestry D a , D* ; R l , recessive parent, its ancestry R 2 , R 

 G and G, germ-cells ; Z, the zygote or fertilised egg-cell ; enclosed in the dotted line S ...... S, 



the somatic cells of the developing body ; G 1 two germ-cells, one with a dominant character 

 1 one with a recessive character ; dominance is indicated by the strong vertical stroke ; 

 recessiveness (latent in the body S ..... S) is indicated by the light horizontal stroke. 



