Books 

• NCERT Class 12 Biology Textbook 
• NCERT Class 12 Biology Lab Manual  

Websites 

• https://ncert.nic.in/textbook/pdf/lebo105.pdf (Chapter – 5, page no: 4)
• https://ncert.nic.in/pdf/publication/sciencelaboratorymanuals/classXII/biology/lelm206.pdf (page no 3, Exercise no: 9)
• https://www.nature.com/scitable/definition/principle-of-segregation-301/