first filial generation

generation /gen·er·a·tion/ (jen″ĕ-ra´shun)

1. reproduction (1).

2. a class composed of all individuals removed by the same number of successive ancestors from a common predecessor, or occupying positions on the same level in a genealogical (pedigree) chart.

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alternate generation  reproduction by alternate asexual and sexual means in an animal or plant species.

asexual generation  production of a new organism not originating from union of gametes.

first filial generation  the first-generation offspring of two parents; symbol F1.

parental generation  the generation with which a particular genetic study is begun; symbol P1.

second filial generation  all of the offspring produced by two individuals of the first filial generation; symbol F2.

sexual generation  production of a new organism from the zygote formed by the union of gametes.

spontaneous generation  the discredited concept of continuous generation of living organisms from nonliving matter.

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first filial generation (F₁),

the heterozygous offspring produced by the crossing of a homozygous dominant strain with a homozygous recessive strain.