Law of Segregation, Monohybrid Cross & Test Cross || Complete Information-FSC Biology скачать в хорошем качестве

Law of Segregation, Monohybrid Cross & Test Cross || Complete Information-FSC Biology

#Lawofsegregation#testcross#geneticsclass12 #biologyfsc Law of Segregation and Test Cross || Complete Information-FSC Biology Law of Segregation + Monohybrid Cross + Test Cross Law of Segregation (Mendel’s First Law) -What it says:Each diploid organism has two alleles for a trait (one from each parent). During gamete formation these alleles seperates (segregate) so each gamete carries only one allele. Why it matters?It explains why offspring aren’t a blend of parents but get distinct versions of a trait. Monohybrid Cross Cross two true‑breeding (homozygous) parents that differ in one trait. Example: Tall (TT) × Dwarf (tt) pea plants. F₁ Generation:All offspring are Tt (heterozygous) → they show the dominant phenotype (tall). -F₂ Generation:Self‑fertilize the F₁ (Tt × Tt). -Genotypic ratio:1 TT : 2 Tt : 1 tt -Phenotypic ratio:3 tall : 1 dwarf Visual cue: Draw a classic 2 × 2 Punnett square to show the segregation of T/t alleles. Test Cross Purpose:Determine the genotype of an individual showing the dominant phenotype (could be homozygous or heterozygous). -How:Cross the unknown individual with a homozygous recessive partner. If the unknown is TT,all offspring show the dominant phenotype. If the unknown is Tt,offspring split ~1:1 (dominant : recessive). Result: The offspring’s phenotypes instantly reveal the hidden genotype. Thanks for watching. Don’t forget to Subscribe❤️.