Homologous example sentences

In the first meiotic division the homologous chromosomes pair to form bivalents, and undergo crossing over.During this phase the chromosomes are fully condensed and the meiotic spindle is assembled to prepare the homologous chromosomes for separation.The beginning of diplotene is recognised by the dissolution of the synaptonemal complex and the tendency of the recombined homologous chromosomes of the bivalents to separate from each other except at the sites of crossovers.Recombination between homologous chromosomes is completed by the end of pachytene, leaving the chromosomes linked at the sites of crossing over.The microtubules from the opposite poles of the spindle attach to the pair of homologous chromosomes.This stage is characterised by the appearance of recombination nodules, the sites at which crossing over occurs between non-sister chromatids of the homologous chromosomes.The homologous chromosomes separate, while sister chromatids remain associated at their centromeres.This is followed by anaphase I in which homologous chromosomes move to the opposite poles with both their chromatids.You have read during nomenclature of different homologous series in Unit 12 that alcohols are the hydroxy derivatives of alkanes.Hence, such a series of compounds in which the same functional group substitutes for hydrogen in a carbon chain is called a homologous series.Can you think of the general formula for alkane family or homologous series? The general formula for alkanes is CnH2n+2, where n stands for number of carbon atoms and 2n+2 for number of hydrogen atoms in the molecule.The complex formed by a pair of synapsed homologous chromosomes is called a bivalent or a tetrad.But the chemical properties, which are determined solely by the functional group, remain similar in a homologous series.Such paired chromosomes are called homologous chromosomes.Crossing over is the exchange of genetic material between two homologous chromosomes.