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How many chromatids are present in a chromosome t the beginning of mitosis?
Two chromatids are present in a chromosome at the beginning of mitosis.
What structures is only present in mitosis?
The structure that is only present during mitosis is the mitotic spindle. This structure is composed of microtubules and is responsible for separating and pulling apart the sister chromatids to opposite poles of the cell. The formation of the mitotic spindle occurs during the prophase stage of mitosis and is crucial for ensuring accurate chromosome segregation. Once mitosis is complete, the spindle disassembles and is no longer present in the daughter cells.
How many chromosomes were present in the nucleus when mitosis began?
Before mitosis begins, a cell has a diploid number of chromosomes, which means there are two sets of chromosomes. This is because during interphase, before mitosis begins, the DNA has already replicated, so the cell contains identical copies of each chromosome.
What is only a single member of a pair of chromosomes present in a cell?
A single member of a pair of chromosomes in a cell is known as a haploid. Haploid cells contain only one set of chromosomes, typically found in reproductive cells such as eggs and sperm. This is in contrast to diploid cells, which contain two sets of chromosomes.
What will happen to an unfertilized egg that undergoes mitosis but not cytokinesis?
Mitosis will separate the sister-chromatids of each chromosome, and each will now be called a chromosome (or daughter-chromosome).Without cytokinesis, the mother-cell will not split into two daughter-cells. The result will be a cell with twice as many chromosomes as the mother-cell.Since an unfertilized egg (ovum) is a gamete, it must be haploid. Doubling the number of chromosomes will produce a diploid cell.
Does metaphase of mitosis meiosis 1or meiosis2 have the haploid number of chromosomes at the equator of the spindle?
In metaphase of meiosis 1, the haploid number of chromosomes is present at the equator of the spindle. Each chromosome is made up of two chromatids.
Sox 9 gene is present on which chromosome?
17
Are homologous chromosomes present in both mitosis and meiosis?
Yes, homologous chromosomes are present in both mitosis and meiosis. In mitosis, homologous chromosomes do not pair up, while in meiosis, homologous chromosomes pair up during prophase I.
How many sister chromatids present during anaphase of mitosis?
There are a total of four sister chromatids present during anaphase of mitosis. Each replicated chromosome consists of two sister chromatids that are held together by a centromere. During anaphase, these sister chromatids separate and are pulled to opposite poles of the cell by the spindle fibers.
In a human nucleus just before cell division how many chromatids are present?
Normally in a cell, there are 92 chromatids, 2 per chromosome. However, when the chromosomes have duplicated before mitosis, there are twice as many, or 184.
Why is the y chromosome useful for tracing ancestry?
The y-chromosome is only present in males. Men will a y-chromosome identical to that of their father, and his father, and his father, etc.
Is the color blindness gene also present on the Y chromosome?
No - the colour blindness gene is only found on the X chromosome.
