====== CHROMOSOME NUMBER  ======

  *  जीवग्रंथ सूत्र दोष 
    * based on sets 
      * haploid ( 22+x , 22+y ) 
      * diploid ( 46 chromosomes - 44 + xx)
      * triploid ( 69 chromosomes)
      * teraploid ( 92 chromosomes )
      * polyploid 
    * based on number of chromosomes in a particular pair  
      * missing chromosome from a pair 
        * monosomy 
          * monosomy of X chromosome 
            * [[:en:monosomy_x | turner syndrome ]] 
      * extra chromosome in a pair
        * trisomy 
          * trisomy of chromosome 21 
            * [[:en:trisomy_21 | down syndrome ]] 
              * 46 + XY or 46 + XX
            * [[:en:trisomy_13 | patau syndrome ]] 
            * [[:en:trisomy_18 | edwards syndrome ]]
          * trisomy of sex chromosomes 
            * [[:en:klinefelter_syndrome | klinefelter syndrome ]]
      * two extrachromosomes in a pair 
        * tetrasomy  




        * strands of knowledge material called as [[:en:chromosome|CHROMATIN ]]
          * sex chromatin or barr body also called lyonization 
            * inactive X chromosome 
              * if two X chromosomes are present one becomes inactive 
                * hence female contains one barr body 
              * if three XXX are present - 2 barr bodies will be seen 
        * knowledge material being grouped and arranged in the form of  
          * आनुवंशिक रूप ( genotype / gender ) 
            * प्राकृतिक लिंग  ( natural genotype / natural knowledge of body )
              * स्त्रीलिंग ( female genotype / knowledge of female)
              * पुल्लिंग ( male genotype / knowledge of male )
            * अप्राकृतिक ( unnatural / unnatural knowledge of body)
              * उभयलिंग ( bisexual) 
              * अर्धस्त्रीलिंग ( half female )
              * अर्धपुरुषलिंग ( half male )
          * Based on ploidy or number of pairs 
            * haploid
            * triploid
            * polyploid
            *  द्विगणित (diploid)
          * Based on nature of pairs being similar or dissimilar 
             * विषमयुग्मज (heterozygous)
               * विषमजात गुणसूत्र / लिंगिक गुणसूत्र (allosomes / Sex chromosome)
                 * X - गुणसूत्र / स्त्रीलिङ्ग गुणसूत्र ( अ , इ , उ ) 
                 * Y - गुणसूत्र / पुल्लिंग गुणसूत्र ( अ , इ , उ ) 
             * सम्युग्मक (homozygous)
               * समजात गुणसूत्र (Autosomes)