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Lysonization takes place ____________(a) 7^th day after fertilization(b) 15^th day after fertilization(c) 1^st month after fertilization(d) 6^th month after fertilizationI got this question in final exam.I need to ask this question from Dosage Compensation Mechanism for X linked Genes topic in portion Chromosomes and Sex Determination of Cytogenetics

Answer»

Right option is (B) 15^th day after fertilization

For explanation I would SAY: Lysonization process takes place in the 15^th day after fertilization when the EMBRYO is 500-1000 CELL STAGE. This inactivated one X chromosome in each cell.



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