The fusion of egg and sperm restores the diploid chromosome number in the zygote .
Early embryonic development in many plants is characterized by asymmetric cell division of the zygote , which specifies apical and basal regions.
In charophytes, the first cell division of the zygote is meiosis, and their plant body is gametophytic.
Most of the regions identified by these deficiencies do not contain previously identified zygotic cell death genes.
Those 10 frozen little 16 or 32 cell zygotes will never be used for anything else.
Several gametic and zygotic reproductive barriers were found in a cross between Japonica and Indica rice varieties.
Conjugation frequencies were calculated by dividing the number of zygotes (one zygote counted as two cells) by the total number of cells present.
Otherwise, abnormal mitosis occurs, which typically results in zygotic death.
It is the sperm basal body that serves as a centriole in the zygotic microtubule organizing center.
A post zygotic mutation restricted to somatic cells has been assumed to be responsible for most cases.