Search results
Results From The WOW.Com Content Network
When each one replicates we end up with pairs of sister chromatids joined at the centromere. These are four homologous chromosomes. At mitosis each of the pairs of sister chromatids will be pulled apart with one chromosome going to each daughter cell. So the daughter cell will end up with a pair of homologous chromosomes, one maternal, one ...
In humans, each set of chromosome is made of 23 chromosomes (22 autosomes and 1 sex chromosome). Pair of chromosome. A pair of chromosome refers to the two homologous chromosomes in a diploid individual (one chromosome from each set for a given chromosome number). Source of information.
All the chromosomes in this image are in metaphase. so each chromosome is made up of 1-pair of chromatids which are sister-chromatids to each-other. Fig 1. This total image showing 1 chromosome (on or before metaphase) showing 2 chromatids (written as A and B). A and B are sister chromatids because their DNA-content resulted from same mother ...
So, if an inversion happens within a chromosome (and changes the ordering of the genetic loci) that chromosome is still homologous to the parental type chromosome that didn't undergo inversion. ETA: Note that chromosomes don't need to be in the same cell (or even the same species) to be homologous and chromosomes can be homologous even if the ...
4. They are similar because, on average, your genome is 99.9% identical to other humans. So, while there are traceable differences on each chromosome that can be mostly mapped back to each parent, the sequence of the chromosomal pairs is nearly the same. Each chromosome has a specific length and set of genes.
Homologous chromosomes (those that are paired up), excluding the sex pair are almost identical in size, shape and genes (members as you called them) present in them. Genes determine traits and each homologous chromosome controls the same traits. The level of identity of a gene inside a population varies between genes.
The correct answer is (B). In meiosis, the homologous pairs line up as individuals in meiosis I in preparation for final segregation in meiosis II. Meiosis simply needs to ensure the pairs end up in opposite daughter cells in meiosis I. It is in mitosis that the homologous pairs line up as pairs, and interphase, of course, is not a phase where ...
The chromosomes of each pair represents homologous chromosomes. Your answer is almost correct. I believe it could be adjusted to: G1: 6 chromosomes G2: 6 chromosomes /12 chromatids Prophase: 12 chromatids Metaphase: 12 chromatids Anaphase: 12 separating chromatids Telophase: 12 chromosomes, 6 one each pole of the cell.
$\begingroup$ We need to make a distinction between the pairing of homologous chromosomes that occurs during meiotic prophase--the pairing that is necessary for homologous recombination, and that forms crossovers, or chiasmata--vs. the lining up of mother and daughter chromosomes on the mitotic spindle's metaphase plate after DNA replication (during S-phase of the cell-cycle).
The Haldane Huxley rule supports the theory that achiasmy evolved to prevent non-homologous recombination between X and Y. However there are species (most mammals) where the X and Y do experience recombination, but recombination is limited to a small part of the chromosomes called the psudo-autosomal region.