What is prophase description?
Prophase is the first phase of mitosis, the process that separates the duplicated genetic material carried in the nucleus of a parent cell into two identical daughter cells. During prophase, the complex of DNA and proteins contained in the nucleus, known as chromatin, condenses.
What is the best description of the prophase?
Medical definitions for prophase prophase. [ prō′fāz′ ] n. The first stage of mitosis, during which the chromosomes condense and become visible, the nuclear membrane breaks down, and the spindle apparatus forms at opposite poles of the cell.
Which description of meiosis is correct?
Meiosis is a process where a single cell divides twice to produce four cells containing half the original amount of genetic information. These cells are our sex cells – sperm in males, eggs in females. During meiosis one cell? divides twice to form four daughter cells.
Which of the following is incorrect for mitosis cell division?
The correct answer is a. Mitosis results in haploid gametes (eggs and sperm) that differ from the diploid parent cell.
What is a fact about prophase?
Prophase: The chromosomes condense into X-shaped structures that can be easily seen under a microscope. Each chromosome is composed of two sister chromatids, containing identical genetic information.
Why is it called prophase?
Prophase (from the Greek πρό, “before” and φάσις, “stage”) is the first stage of cell division in both mitosis and meiosis. Beginning after interphase, DNA has already been replicated when the cell enters prophase.
What is prophase in simple words?
1 : the initial stage of mitosis and of the mitotic division of meiosis characterized by the condensation of chromosomes consisting of two chromatids, disappearance of the nucleolus and nuclear membrane, and formation of mitotic spindle.
What is the description of interphase?
Interphase is the ‘daily living’ or metabolic phase of the cell, in which the cell obtains nutrients and metabolizes them, grows, replicates its DNA in preparation for mitosis, and conducts other “normal” cell functions. Interphase was formerly called the resting phase.
What is the difference between meiosis I and meiosis ll?
Both produce two daughter cells from each parent cell. However, Meiosis I begins with one diploid parent cell and ends with two haploid daughter cells, halving the number of chromosomes in each cell….How is Meiosis I Different from Meiosis II?
|Meiosis I||Meiosis II|
|Ends with 2 daughter cells||Ends with 4 daughter cells|
What is meiosis also called?
meiosis, also called reduction division, division of a germ cell involving two fissions of the nucleus and giving rise to four gametes, or sex cells, each possessing half the number of chromosomes of the original cell.
What is the number of divisions in meiosis?
In meiosis, DNA replication is followed by two rounds of cell division to produce four daughter cells, each with half the number of chromosomes as the original parent cell. The two meiotic divisions are known as meiosis I and meiosis II.
What major event occurs during interphase?
During interphase, the cell grows and makes a copy of its DNA. During the mitotic (M) phase, the cell separates its DNA into two sets and divides its cytoplasm, forming two new cells.
When does prophase occur in the division cycle?
Prophase exists in both mitosis and meiosis. During mitosis and meiosis, prophase is the first phase of the division cycle after DNA replication in G and S phases. The main value of prophase is that the chromatin condenses to become chromosomes, which will later be separated in various ways during the final stages…
What happens to the homolog pair during prophase I?
Prophase I Prophase I During prophase I the two members of each homolog pair become intimately associated along their entire lengths (that is, they “synapse”) to form a structure known as a tetrad (or bivalent).
Where does the last name prophase come from?
Etymology: The name prophase is derived from the Latin word pro, meaning before. Some other bio-terms starting with pro: prognosis, prokaryote, pronucleus.
What is the prophase diagram of crossing over?
Prophase I. Diagram of crossing-over. Note that while crossing over is shown here, for simplicity, between only one of the two chromatids of each chromosome, each chromatid of each chromosome actually synapses with one of the chromatids of that chromosome’s homolog.