Question

Mitosis in an onion root: Introduction: Mitosis can be observed in cells that are in a state of growth. In this lab, you will observe cells and identify which stage of cell division the cells are in. To help you do this, let’s review what characteristics to look for at the different stages. Also remember, interphase is not technically a part of mitosis, but it is part of the cell cycle and many of the cells you will be looking at are in interphase. A. Identify each stage of mitosis on the chart below and describe what you would expect to see.

Answer 1

Mitosis in an onion root involves interphase, mitosis, and cytokinesis. Interphase consists of three stages: G1, S, and G2. Mitosis consists of five stages: prophase, prometaphase, metaphase, anaphase, and telophase.

Step-by-step explanation:

Interphase: Interphase is the stage when the cell undergoes normal growth processes while preparing for cell division. It consists of three stages: G1, S, and G2. During G1, the cell doubles in size and doubles the number of organelles. In the S phase, DNA replication occurs, creating an identical copy of the cell's DNA. The G2 phase involves the synthesis of proteins that aid in cell division.

Mitosis: Mitosis is divided into five phases: prophase, prometaphase, metaphase, anaphase, and telophase. Prophase is characterized by the condensation of chromosomes and the disappearance of the nuclear envelope. Prometaphase is marked by the attachment of spindle fibers to the chromosomes. In metaphase, the chromosomes align along the equator of the cell. Anaphase is the phase when the sister chromatids separate and move towards opposite poles. Telophase is the final phase, with the formation of two nuclei and the decondensation of chromosomes.

Cytokinesis: Cytokinesis is the process of dividing the cytoplasm and cell body into two new cells. It occurs after mitosis and completes the cell division.