127. According to sutton and Boveri segregation of a pair of factors is because of :- (1) Spliting of chromosomes at anaphase of mitosis (2) Segregation of homologous chromosomes at anaphase of meiosis-I 3. Random arrangement of chromosomes at equator | during meiosis-I (4) Random arrangement of chromosomes at equator during mitosis.
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2
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Answer:
Explanation:
1.Anaphase (from Ancient Greek word, Anaphase is the stage of mitosis after the process of metaphase, when replicated chromosomes are split and the newly-copied chromosomes (daughter chromatids) are moved to opposite poles of the cell.
2.Chromosome segregation occurs at two separate stages during meiosis called anaphase I and anaphase II (see meiosis diagram). ... These chromosomes (paired chromatids) then pair with the homologous chromosome (also paired chromatids) present in the same nucleus (see prophase I in the meiosis diagram).
3.During metaphase I, the homologous chromosomes are arranged in the center of the cell with the kinetochores facing opposite poles. The homologous pairs orient themselves randomly at the equator.
4.The homologous pairs orient themselves randomly at the equator. This event is the second mechanism that introduces variation into the gametes or spores. In each cell that undergoes meiosis, the arrangement of the tetrads is different.