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Monohybrid cross
 

Monohybrid cross

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    Monohybrid cross Monohybrid cross Presentation Transcript

    • Monohybrid Cross A monohybrid cross is a cross between two individuals differing in one character pair.
    • Parents
    • Parents F 1 Generation
    • F1 Plant is self pollinated to produce the F2 Generation.
    • F 2
      • T T
      t t Tall Plant Dwarf Plant Parents
      • T T
      t t Tall Plant Dwarf Plant Parents Gametes T t
      • T T
      t t Tall Plant Dwarf Plant T t Parents Gametes F 1 Generation T t
      • T T
      t t Tall Plant Dwarf Plant T t Parents Gametes F 1 Generation Tall Plant T t
      • T t
      T t Tall Plant Tall Plant F1 Plant is self pollinated to produce the F2 Generation.
      • T t
      T t Tall Plant Tall Plant Gametes T t T t
    • T t Tall Plant Tall Plant Gametes F 2 Generation T t T t T t t t T T
      • T t
      T t Tall Plant Tall Plant Gametes F 2 Generation F 2 Phenotypic ratio is 3 : 1 F 2 Genotypic ratio is 1 : 2 : 1 T t T t t t T t T t T T t t T T
      • Factor
      • Mendel used the term factor to describe a hereditary unit. According to Mendel, each character is controlled by a pair of factors
      • Alleles
      • Alleles are two or more alternate forms of a single gene.
      • Dominant allele
      • The allele which is expressed in a hybrid.
      • Recessive allele
      • The allele which remains hidden in a hybrid.
      • Homozygous
      • It is the condition with two identical alleles of a gene.
      • Heterozygous
      • It is the condition with two different alleles of a gene.
      • Gamete
      • Egg or sperm which has only one allele of each gene and half the number of chromosomes (haploid)
      • Genotype
      • It is the specific genetic constitution of an organism.
      • Phenotype
      • It is the external expression of a genotype.
      • Monohybrid cross
      • Cross of two parents differing in one character pair.
      • Offspring
      • Offspring or progeny are the children from sexual mating.
      • F 1
      • The first filial generation.