Mitosis and meiosis bio lab

Mitosis is the first of these studied in this lab. It is easily observed in cells that are growing at a rapid pace such as whitefish blastula or onion root tips, which are used in this lab.

Mitosis and meiosis bio lab

The two kinds of cellular division are mitosis and meiosis. Mitosis usually makes body cells, somatic cells. Making an adult organism from an egg, asexual reproduction, regeneration, and the maintenance and repair of body parts are performed during mitotic cell division.

This process called meiosis makes gametes, in animals, and spores, in plants. Gamete or spore cells have half the chromosomes that the parent cell has. In plants mitosis takes place in the meristems which are normally found at the tips of stems or roots.

However, in animal cells cell division takes place every where as new cells are formed and old ones are replaced. Studying mitosis can be accomplished by looking at tissues where there are many cells in a process of meiosis. Two examples are an onion root tip, or developing embryos, in animals such as whitefish blastula.

A blastula is formed after an egg is fertilized and the egg begins to divide. There are several phases of the mitotic cell cycle. A precursor to mitosis is interphase. The actual steps of the mitotic cell cycle are prophase, metaphase, anaphase, and telophase.

Interphase is a stage in the cell cycle in which the cell is not dividing. The nucleus contains a nucleolus and also contains chromatin. During interphase DNA replication occurs. The first phase of mitotic cell division is prophase.

During prophase the chromatin begins to thicken until noticeable chromosomes are formed. Each chromosome has two chromatids that are joined at the centromere. During the later part of prophase, the nuclear envelope and nucleolus disappear.

Mitotic spindle fibers, composed of microtubules, also become apparent. Following prophase is metaphase.

By the time the cell has reached metaphase the chromosomes have moved to the center of the mitotic spindle. The centromere of the chromosome attaches to the spindle. The centromeres of each chromosome line up on an area called the metaphase plate.

Metaphase is followed by anaphase. In the beginning of anaphase, the centromeres of each pair of chromatids separate and moved by the spindle fibers to the opposite ends of the cell.

When the daughter chromosomes reach the ends of the cell the form a clump at each spindle pole.

Mitosis and meiosis bio lab

The final phase of mitosis is telophase.Meiosis is the second important kind of nuclear division. It resembles mitosis in many ways but the consequences of meiotic divisions are very different from those of mitotic divisions.

It resembles mitosis in many ways but the consequences of meiotic divisions are very different from those of mitotic divisions. 1 Lab 8 Mitosis and Meiosis Introduction: All new cells come from previously existing cells.

New cells are formed by karyokinesis (the process in cell. Learn mitosis meiosis biology lab with free interactive flashcards. Choose from different sets of mitosis meiosis biology lab flashcards on Quizlet.

Mitosis is usually used for the growth and replacement of somatic cells, while meiosis produces the gametes or spores used in an organism’s reproduction. Mitosis is the first of these studied in this lab. Meiosis is the second important kind of nuclear division. It resembles mitosis in many ways but the consequences of meiotic divisions are very different from those of mitotic divisions.

It resembles mitosis in many ways but the consequences of meiotic divisions are very different from those of mitotic divisions. Mitosis & Meiosis -AP lab 3. Introduction Cells come from preexisting cells.

New cells are formed during cell division which involves both replication of the cell’s nucleus, karyokinesis, and division of the cytoplasm, cytokinesis.

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