Which of the following about the law of segregation is true?

  1. It states that each of two alleles for a given trait segregate into same gametes.
  2. It can be explained by the segregation of heterologous chromosomes during meiosis.
  3. It can account for the 3:1 ratio seen in the F2 generation of Mendelʹs crosses.
  4. It is a method that can be used to determine the number of chromosomes in a plant.
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