zygote
合子,合子细胞,合生元,合子体
Definitions
- 1
Biology.
- : the cell produced by the union of two gametes, before it undergoes cleavage.
Examples
It’s possible that some of these epigenetic changes tell a zygote to split.
This ensures that the zygote will have a normal genetic complement of just two pairs of 23 chromosomes, one from the mother and one from the father, rather than a grossly inflated number that would result if multiple sperm fertilized the egg.
The zygote was then returned to the mother’s uterus, where it could implant and grow in an otherwise normal pregnancy.
The zygote contains all the genetic information it needs to become a new individual.
From such a cell (zygote), half male, half female, the body of every living organism has sprung.
If this is true, the centrosome of the zygote nucleus must be entirely derived from that of the male pronucleus.
The first change the zygote undergoes in all animals is what is generally called the segmentation or cleavage of the ovum.
Is it, in other words, an unalterable property of the zygote, a genetic character?
But when the zygote in its turn comes to form gametes, the partnership is broken and the process is reversed.