CHROMOSOMAL BASIS OF INHERITANCE

CHROMOSOMAL BASIS OF INHERITANCE

8.   CHROMOSOMAL BASIS OF INHERITANCE

Chromosomal basis of inheritance was given by Boveri–Sutton. Chromosome theory of inheritance allows us to see the relationship between Mendel’s laws and chromosome transmission. According to chromosomal basis of inheritance.
   1     Chromosomes are the carriers of genetic material. 
   2     Genes are present on specific loci on chromosomes. 
   3     Homologous chromosomes undergo segregation of the alleles at each genetic locus to different gametes.
 4     Nonhomologous chromosomes undergo independent assortment during meiosis. 
Mendel’s law of segregation can be explained by the homologous pairing and segregation of chromosomes during meiosis.


Mendel’s law of independent assortment can be explained by the relative behaviour of different nonhomologous chromosomes during meiosis.


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