A cross between F1 offspring and its homozygous recessive parent is called a test cross.
Significance of testcross
1. Genotype Identification: Test cross helps determine the genotype of a plant expressing dominant traits, revealing whether it is homozygous or heterozygous.
2. Understanding Genetic Composition: It is a valuable tool for discerning the genetic makeup of plants, crucial for understanding the inheritance patterns.
3. Introduction of Recessive Traits: Test cross aids in introducing beneficial recessive traits in hybrids of self-pollinated plants, contributing to genetic improvement.
4. Efficiency in Crop Improvement: As a swift method, test cross accelerates the process of crop variety improvement, serving as a practical tool for breeders and geneticists.
5. Verification of Inheritance Laws: Test cross can be employed to validate fundamental laws of inheritance, enhancing our understanding of genetic principles.