Answer:
The correct answer will be- Meiosis anaphase I and II.
Step-by-step explanation:
The segregation of gene pairs usually takes place during the gamete formation which is formed by the meiosis.
During anaphase I and II, the chromosome containing the genes which determine the traits of an organism gets separated reaching the opposite poles of the cells through mitotic spindles.
The segregation of gene plays an important role in determining the trait of the organism as the alleles show their effect only when they come in pairs after fertilization.
Thus, Meiosis anaphase I and II is the correct answer.