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Although there is only one chromosome set, each homolog still consists of two sister chromatids. In spite of their appearance, chromosomes are structurally highly condensed, which enables these giant DNA structures to be contained within a cell nucleus.
#CHROMOSOMES CONDENSE FULL#
Therefore, only one full set of the chromosomes is present.
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The cells are haploid because at each pole there is just one of each pair of the homologous chromosomes. Two haploid cells are the end result of the first meiotic division. It is important that the daughter cells have a copy of every chromosome, so the process involves copying the chromosomes first and then carefully. This cell plate will ultimately lead to the formation of cell walls that separate the two daughter cells. Why do chromosomes condense during mitosis In mitosis a cell divides to form two identical daughter cells. D: Done with mitosis Cytoplasm, cell jelly pinches in 2 new nuclear membranes. In plants, a cell plate is formed during cell cytokinesis by Golgi vesicles fusing at the metaphase plate. C: Chromosomes Condense Centrioles polarize Nuclear membrane disintegrate. In nearly all species of animals and some fungi, cytokinesis separates the cell contents via a cleavage furrow (constriction of the actin ring that leads to cytoplasmic division).
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Then cytokinesis, the physical separation of the cytoplasmic components into two daughter cells, occurs without reformation of the nuclei. In some organisms, the chromosomes decondense and nuclear envelopes form around the chromatids in telophase I. In telophase I, the separated chromosomes arrive at opposite poles. With n = 23 in human cells, there are over 8 million possible combinations of paternal and maternal chromosomes. Answer to: When do chromosomes condense By signing up, you&039 ll get thousands of step-by-step solutions to your homework questions. In this example, there are four possible genetic combinations for the gametes. The total possible number of different gametes is 2n, where n equals the number of chromosomes in a set. In this case, there are two possible arrangements at the equatorial plane in metaphase I. \( \newcommand\): Meiosis I ensures unique gametes: Random, independent assortment during metaphase I can be demonstrated by considering a cell with a set of two chromosomes (n = 2).