To solve this problem, we need to identify which feature is not characteristic of mitosis in somatic cells. Let's analyze each option:$\newline \bullet$Spindle fibres:$\newline$ - During mitosis, spindle fibres form to help separate the chromosomes into the daughter cells.$\newline$ - This is a characteristic feature of mitosis.$\newline \bullet$Disappearance of nucleolus:$\newline$ - The nucleolus disappears during prophase of mitosis as the chromatin condenses.$\newline$ - This is a characteristic feature of mitosis.$\newline \bullet$Chromosome movement:$\newline$ - Chromosomes move to the equatorial plane during metaphase and are pulled apart during anaphase.$\newline$ - This is a characteristic feature of mitosis.$\newline \bullet$Synapsis:$\newline$ - Synapsis is the pairing of homologous chromosomes that occurs during prophase I of meiosis, not mitosis.$\newline$ - This is not a characteristic feature of mitosis.$\newline$Therefore, the correct answer is Option 4: Synapsis, as it is not a feature of mitosis in somatic cells.