Parental, F1, F2 Generation
In the following interpretation, we consider autosomal localization of genes , monogenic inheritance of the trait and complete dominance and recessivity .
Parental generation[edit | edit source]
Monohybridism[edit | edit source]
The parental generation (parental generation) in the hybridization experiment must always be homozygous for the gene/trait under investigation . In the case of monohybridism , this means that if, for example, males are dominant AA homozygotes in the gene under study, then females must be recessive aa homozygotes .
For more information see Monohybridismus.Dihybridism[edit | edit source]
When monitoring two genes simultaneously (dihybridism), the genotype of the parental generation entering the hybridization trial can be:
- AABB x aabb
- AAbb x aaBB
Trihybridism[edit | edit source]
With simultaneous monitoring of three genes (trihybridism), the genotype of the parental generation entering the hybridization experiment can be:
- AABBCC x aabbcc
- AAbbCC x aaBBcc
- AABBcc x aabbCC
- aaBBCC x AAbbcc
F1 generation[edit | edit source]
Gametes carry a reduced (haploid) number of chromosomes ; their fusion creates the F1 generation (first filial generation - first generation of offspring). The F1 generation is always uniform; these are heterozygotes in all monitored loci :
- monohybridism – genotype Aa
- dihybridism – genotype AaBb
- trihybridism – AaBbCc
