Question

In hybridisation the haploids combine the advantage of

• A. Recombination
• B. Segregation
• C. Fixation
• D. All

Answer 1

The correct option is A Recombination

• The only haploid cells that are present in the body of an multicellular organism are the gametes that are produce by the meiosis of the mother cell.
• The genetic material of the mother cell is halved and only the number of chromosomes from the mother cell are transferred to the daughter cell.
• In the diplotene stage of prophase 1 of meiosis 1 cell division the non sister chromatids preform crossing over due to which they are able tp exchange genetic material at the point of crossing over.
• Due to this crossing over the gene that are present on one arm of a chromosome are exchange with the arm of the non sister chromatid which has gene for other characters present on its arms. This whole exchange is called recombination gene as new combination other than the parental combination are formed.
• Recombination is therefore one of the advantage of meiosis as it gives chance for development of varied and new characters in organisms
• Segregation is the movement of gene of a character to the gametes that are formed. During the formation of gametes only one of the gene from the alleles for a single character is segregated to the gametes as per the Mendelian law of segregation or the law of purity of gametes.
• Therefore the answer 'Recombination' is correct.