Filial Progeny – Class 12 | Chapter – 5 | Biology Short Notes Series PDF
Filial Progeny: The offsprings or children produced as a result of a cross between two individuals is called the filial generation or progeny. Gregor Mendel, conducted hybridization experiments on garden peas for seven years and proposed the laws of inheritance in the living organisms. The filial generation is a successive generation that results from the genetic controlled cross made between two parents. It is represented by the alphabet “F”. The generation of parents is represented by the symbol “P”, parental generation. The filial generations can be F1, F2, and so on.
Filial Progeny
The F1 represents the first filial generation that is produced by the cross made between the two parents. The F1 generation used to do reproduction and produce second filial generation or F2 generation.
Difference between F1 and F2 Generation
| Basis of Difference | ||
| Definition | It is the first filial generation obtained by crossing two different parents. | It is the second filial generation obtained by self crossing the F1 generation. |
| Parents | The parents are distinct: one is homozygous dominant for both the traits, and the other is homozygous recessive for both the traits. | The parents are heterozygous for both traits. |
| Phenotype | All the offspring show dominant characteristics for both the traits. | The generation shows a phenotypic ratio of 9:3:3:1 |
| Importance | It is important for hybridization as it yields the best characteristics from both the parents. | It is important for maintaining a pure line or stabilizing the traits over generations. |
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