Which of the following is not a property of homologous chromosomes? They pair physically during prophase of meiosis I. They segregate to opposite poles at anaphase of meiosis I. They carry alleles for the same genes at the same chromosomal position. They are attached to the same centromere during G₂ of the cell cycle. They exchange genes by crossing-over during meiosis.

Meiosis is an important cellular process for organisms that reproduce sexually. Two lab partners (A and B) are shown this diagram of a meiotic cell and asked to identify its phase. Partner A believes that this cell is in prophase of the first meiotic division. Partner B believes that this cell has moved past prophase of meiosis I and is in a later phase of meiosis. Which partner is correct, and what evidence accurately would defend their belief? Partner A is correct. The chromosomes have clearly replicated during interphase and are beginning to decondense into chromatin. O Partner A is correct. The nuclear membrane is beginning to re-form and centrioles are beginning to migrate to opposite poles of the cell. Partner B is correct. Homologous chromosomes are no longer paired together, so the cell must be in first phase of meiosis II, not meiosis I. O Partner B is correct. The cell plate is beginning to form between the two centrioles, indicating the cell is actually in later phase of…

Here is a list of events out of order for nondisjunction during meiosis l: A One homologous chromosome pair moves to the same side of the cell B Gametes are produced with the wrong number of chromosomes C Alignment of homologous pairs on the metaphase plate D Pairing and synapsis of homologous chromosomes E Spindle fibers shorten to separate the homologous chromosomes What is the correct order of events? i DCEAB CDAEB CDAEA DCEBA

Is there homologous chromosome pairing in mitosis? and in meiosis? Explain.