3
gametes
pee that's right pee
Fertilization of the egg by the sperm. The resulting cell is a zygote, which contains the same number of chromosomes as a normal body cell for that species. For example, in humans, sperm cells have 1 set of 23 chromosomes, as do egg cells. So when they unite in fertilization, the zygote will have 2 sets of 23 chromosomes, for a total of 46.
Yes, during the process, I believe the Zygote -pretty much randomly- divides into two, which leads to genetically equivalent twins (whether or not they are identical is another story).
Identical twins are genetically the same, because they come from the same fertilized egg/sperm cell zygote, which happens to split into two viable zygotes. Fraternal twins, however, come from two different egg/sperm cell zygotes, that are concurrently fertilized and remain viable.
Embryo is produced by cell division of zygote .
halploid
One would think it's embryo but a zygote is not a embryo yet, it is the early stage of what will become a embryo. Zygote is the word used and you can use the word cell since a zygote is the initial cell formed after a sperm and egg have joined. After 1 week it has transformed into a embryo.
halploid
meiosis
Haploid
meiosis
I dont freaking know
A newly formed zygote forms immediately begins the process of cell division and differentiation which lead to the formation of an embryo.
1. gametes - zygote - fertilization - embryo 2. fertilization - zygote - gametes - embryo 3. zygote - gametes - fertilization - embryo 4. gametes - fertilization - zygote - embryo answer is 4. gametes-fertilization-zygote-embryo
Babies don't become embryos, it's the other way around. A fertilised egg becomes a zygote, a zygote becomes an embryo, an embryo becomes a foetus, a foetus becomes a baby.
After cleavage finishes, the cell cycle continues as normal - cell division slows, yet cells grow in size instead of just continually dividing. This is when gastrulation begins (the in-folding of the hollow blastula into multiple germ layers forming the ectoderm, mesoderm, and endoderm).