Campbell Biology Chapter

21) As sperm are produced, they go through several stages. Which stage develops directly into mature motile sperm?

In M phase (Mitosis), the DNA and proteins in each chromosome form highly compacted structures

Anaphase – the chromosomes are divided into single from pair and the chromosomes move to opposite poles

c) Why are there two sets of phases during meiosis, but only one during mitosis? Think about what is different about meiosis and mitosis. (1 point)

4)++ As shown in the following figure, plant cell cytokinesis differs from animal cell cytokinesis because

C. A chromatid is a chromosome that has been replicated but has not yet separated from its sister chromatid.

2.) Based on the data table, what can you infer about the relative length of time an onion root tip cell spends in each stage of cell division?

A) The genetic material in one eukaryotic cell is copied and distributed to two identical daughter cells.

2. In which phases of mitosis are sister chromatids visible, and attached to each other at the centromere?

Which of the following are features of mitosis? Select all that apply. Answers: Reduces the number of chromosomes to half

Chromosome pairs line up across the equator of the spindle at metaphase I (5). In anaphase I the chromosomes separate and travel to opposite ends of the spindle. The chromosomes migrate to the equators of two new spindles for metaphase 2 (7). Next the chromatids are pulled apart in anaphase 2 to form four clusters of chromosomes in telophase 2. The nuclear envelopes reform around four haploid nuclei that will give rise gamete

17) The process by which the cytoplasm of a eukaryotic cell divides to produce two cells is called

At prophase the chromosomes become condense to become visible and the membrane begins to break down. The chromosomes line up along the centre of the equator during metaphase. The chromatids separate and are pulled to opposite poles during anaphase. In telophase these separate chromatids

Mitosis, as defined by the Merriam Webster dictionary, is a process that takes place in the nucleus of a dividing cell. It involves a series of steps consisting of prophase, metaphase, anaphase and telophase. This results in the formation of two new nuclei each having the same number of chromosomes as the parent nucleus.

It is expected that the most common phase of mitosis seen will be interphase as the cell spends around ninety percent of its time in this phase. This is because interphase is the period between cell division in which the cells grows, DNA replicates and centrioles divide. It is such a long phase that it is even split into three sub-phases; G1 phase in which a cell grows, S phase or synthesis, in which a cell copies its chromosome and G2 phase in which the cell grows further and prepares for division.