The zygote elongates and then divides asymmetrically, in a process regulated by YODA (YDA), a mitogen-activated protein kinase (MAPK) kinase kinase. This division forms the apical cell ...

During fertilisation the haploid nucleus of a sperm cell and the haploid nucleus of an egg cell fuse together to form a diploid zygote.

What came first, the chicken or the egg? If we’re talking about eggs in general, then the latter, but a new study of an ...

There is an initial duplication of DNA before cell division followed by stages of ... each parent contributes 23 chromosomes to the zygote through a process of chromosomal reduction called meiosis ...