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Do you see any relation between the number of carbon and hydrogen atoms in these compounds? The general formula for alkenes can be written as CnH2n, where n = 2, 3, Can you similarly generate the general formula for alkanes and alkynes? As the molecular mass increases in any homologous series, a gradation in physical properties is seen.Recombination between homologous chromosomes is completed by the end of pachytene, leaving the chromosomes linked at the sites of crossing over.Hence, such a series of compounds in which the same functional group substitutes for hydrogen in a carbon chain is called a homologous series.This is followed by anaphase I in which homologous chromosomes move to the opposite poles with both their chromatids.Analogous to the physical systems chemical reactions also attain a state of equilibrium.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.While buying many commodities, on the cover, you might have seen a logo with the letters ISI, Agmark or Hallmark.The homologous chromosomes separate, while sister chromatids remain associated at their centromeres.Analogously, a rise in prices of a country's exports will decrease that country's net exports and output and income.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.Such paired chromosomes are called homologous chromosomes.The complex formed by a pair of synapsed homologous chromosomes is called a bivalent or a tetrad.During this phase the chromosomes are fully condensed and the meiotic spindle is assembled to prepare the homologous chromosomes for separation.But the chemical properties, which are determined solely by the functional group, remain similar in a homologous series.The microtubules from the opposite poles of the spindle attach to the pair of homologous chromosomes.
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