4.In the zygotene stage of prophase, the pairing of chromosomes occurs. During pachytene, the crossing-over occurs. The chiasmata are formed in the diplotene stage.5.Synaptonemal complex is not formed.5.Synaptonemal complex is formed during the zygotene stage of prophase I.6.Anaphase involves the separation of the chromatids of each chromosome.6.During anaphase I, the homologous chromosomes separate, while the chromatids remain attached at their centromeres.During anaphase II, the chromatids separate as a result of the splitting of the centromere.7.Mitosis plays a significant role in the healing, repair, and growth of a cell.7.Meiosis brings about variation and maintains the chromosome number from generation to generation.
5.Why is mitosis called equational division? Mitosis is the process of cell division wherein the chromosomes replicate and get equally distributed into two daughter cells. The chromosome number in each daughter cell is equal to that in the parent cell, i.e., diploid. Hence, mitosis is known as equational division.
(iii) Zygotene of prophase of meiosis I
(iv) Pachytene of prophase of meiosis I
The pairing of homologous chromosomes is called synapsis. This occurs during the second stage of prophase I or zygotene.
Bivalent or tetrad is a pair of synapsed homologous chromosomes. They are formed during the zygotene stage of prophase I of meiosis.
Chiasmata is the site where two non sister chromatids have crossed over. It represents the site of cross-over. It is formed during the diplotene stage of prophase I of meiosis.
8.Plant and animal cells both undergo mitotic cell divisions. Their main difference is how they form the daughter cells during cytokinesis. During that stage, animal cells form furrow or cleavage that gives way to formation of daughter cells. Due to the existence of the rigid cell wall, plant cells don't form furrows.
10.Anaphase is the stage during which the centromere splits and the chromatids separate. The chromosomes move apart, toward the opposite poles. ... During anaphase I, the homologous chromosomes separate, while the chromatids remain attached at their centromeres.
11.Mitosis consists of one stage whereas meiosis consists of two stages. Mitosis produces diploid cells (46 chromosomes) whereas meiosis produces haploid cells (23 chromosomes). Mitosis produces two identical daughter cells whereas meiosis produces four genetically different daughter cells.
12.Meiosis is the process by which sexually reproducing organisms make their sex cells, sperm and eggs. During meiosis, a specialized cell called a germ cell splits to make four new sex cells, each with half the number of chromosomes as the original germ cell.
14.Mitotic cell division cannot take place without DNA replication in S phase. ... DNA duplication is important as it maintains the chromosome number in the daughter cells and hence Mitosis is an equational division. Therefore, the duplication of DNA is an essential step and without it, no mitosis can take place.
15.There can be DNA replication without cell division. During cell division, the parent cell gets divided into two daughter cells. However, if there is a repeated replication of DNA without any cell division, then this DNA will keep accumulating inside the cell.
MITOSIS/ Hyperplasia is the increase number of cells due to to increase cell division (mitosis).
Abnormal or unusual prolifiration (multiplication) of cells due to constant cell division.
Meiosis-Meiosis is defined as the cellular and nuclear processes that reduce the chromosomal content per nucleus from two sets to one set.
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MITOSIS INVOLVES DIVISON OF BODY CELLS AND MEIOSIS INVOLVES DIVISION OF SEX CELLS.
DIVISION OF CELL IN MITOSIS OCCUR ONCE WHEREAS IN MEIOSIS IT OCCURS TWICE.
DAUGHTER CELLS RESULTING FROM MITOSIS IS DIPLOID AND FROM MEIOSIS IS HAPLOID.
NO RECOMBINATION OVER OCCURS IN MITOSIS WHEREAS GENETIC RECOMBINATION OCCURS IN MEIOSIS.
In single-cell organisms, mitosis is the only form of cellular reproduction. One round of mitosis yields two genetically identical cells. In bacteria, this process results in an entirely new, independent organism. This is classified as asexual reproduction because it does not require sex for the creation of new organisms. In multi-cellular organisms, like ourselves, mitosis only occurs in somatic cells, which comprise all cells in an organism excluding germ cells.
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