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Is the chromosome number of zigote , embryonal cells and a perticular organism always constant? how is the constancy maintained in these 3stages?



Yes, the chromosome number of zygote, embryonal cell and adult of a particular organism is always constant.Meiosis is the cell division which happens during gametogenesis,. This results in number of chromosomes getting halved in gametes. When fertilization happens, the number of chromosomes becomes equal to that in somatic cells. After that, mitosis takes place during rest of the stages of life. So, the constancy of chromosomal number is maintained in all the three stages.
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No, chromosome number in zygote is diploid while embryonal cells and organism has haploid chromosome number
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