Yes they are identical twins.
During the first two months of pregnancy the unborn child is known as an embryo.
Embryo twinning is a form of reproduction where a single embryo splits into two separate embryos, resulting in genetically identical offspring. This can occur naturally or be artificially induced in a laboratory setting. Twins formed by embryo twinning are known as identical or monozygotic twins.
Twins from one embryo occur when a single fertilized egg splits into two embryos early in development. This results in identical twins who share the same genetic material. This phenomenon is known as monozygotic twinning.
A raw egg contains two main liquids: egg white (albumen) and egg yolk. The egg white is clear and surrounds the yolk, which is a yellow-orange color and contains most of the egg's nutrients and fat.
Twins can either be fraternal (resulting from two separate eggs fertilized by two different sperm) or identical (resulting from a single fertilized egg that splits into two embryos). So, while fraternal twins are two separate babies, identical twins come from a split embryo.
A fertilized egg's yolk provides all of that embryo's nutrient, it also provides protection to the embryo. There are two types of yolk, white yolk and yellow yolk, both having their purpose.
It takes many sperm to break the outer barrier of the egg, but only one to fertilize it. When that sperm meets the egg, their genetic material (chromosomes) combine to form 46 and the fertilized egg, zygote, beings to rapidly divide into a blastocyst. After about two weeks it is called an embryo, and after eighth weeks a fetus. After about 40 weeks, it is born and is called an infant.
When twins are formed from one embryo, it is known as monozygotic twinning. This occurs when a single fertilized egg splits into two embryos. As a result, the twins will share the same genetic material, leading to identical or monozygotic twins.
The embryo is formed through fertilization of the egg cell by the sperm cell. This union creates a zygote that develops into the embryo. The endosperm, on the other hand, is formed through the fusion of a sperm cell with two polar nuclei in the embryo sac of a plant.
Identical twins come from one egg and one sperm. Fraternal twins come from two eggs and two sperm.
After the production of a zygote through fertilization, the zygote undergoes multiple rounds of cell division to form a blastocyst. The blastocyst then implants into the uterus to continue developing into an embryo.