NEET BIOLOGY

Detailed explanation-1: -F1 stands for Filial 1, the first filial generation seeds/plants or animal offspring resulting from a cross-mating of distinctly different parental types. Generally, the characters of plants, insects, animals, and human beings are the results of countless genes interactions.

Detailed explanation-2: -An F1 hybrid (also known as filial 1 hybrid) is the first filial generation of offspring of distinctly different parental types. F1 hybrids are used in genetics, and in selective breeding, where the term F1 crossbreed may be used. The term is sometimes written with a subscript, as F1 hybrid.

Detailed explanation-3: -Organisms in this initial cross are called the parental, or P generation. The offspring of the RRYY x rryy cross, which is called the F1 generation, were all heterozygous plants with round, yellow seeds and the genotype RrYy.

Detailed explanation-4: -Test cross: It is a cross between an organism of which the genotype is not known with a parent showing recessive traits. It is used for determining whether the offspring is homozygous or heterozygous for a particular trait. Back cross: It is a cross between the F1 generation heterozygous hybrid to one of the parents.