How does the zebrafish develop from one cell to the many cells that make up the larva?
Zebrafish develop rapidly from a one-cell zygote that sits on top of a large yolk cell. Gastrulation begins approximately 6 h post fertilization, hatching at 2 days as a free-swimming larvae. Zebrafish reach sexual maturity around 3 months of age and can live for up to 5 years.
How long is zebrafish embryogenesis?
∼6 weeks
After the embryonic period, larval development lasts ∼6 weeks, during which the fish more than triple in length and progress through a series of morphological changes that transform the fins, pigment pattern, and overall body morphology into the juvenile configuration. In zebrafish, this occurs around 45 dpf at 28.5°C.
What is the process of embryogenesis?
Embryogenesis is the process of initiation and development of an embryo from a zygote (zygotic embryogenesis) or a somatic cell (somatic embryogenesis). Embryo development occurs through an exceptionally organized sequence of cell division, enlargement and differentiation.
How long is the larva stage of zebrafish?
How long does it take zebrafish to mature?
Method For Maximal Embryo Production Although zebrafish reach sexual maturity in 10-12 weeks, the breeding fish should be between 7 and 18 months of age for maximum embryo production.
What are the phases of cell division?
These phases are prophase, prometaphase, metaphase, anaphase, and telophase. Cytokinesis is the final physical cell division that follows telophase, and is therefore sometimes considered a sixth phase of mitosis.
What is the embryonic shield in zebrafish?
The appearance of the embryonic shield, a slight thickening at the leading edge of the blastoderm during the formation of the germ ring, is one of the first signs of dorsoventral polarity in the zebrafish embryo.
What is the first stage of embryogenesis?
Stage 1: The process of embryogenesis begins with an egg or ovum being fertilized by a sperm cell to form a zygote. The zygote is surrounded by a strong membrane made up of glycoproteins, which the sperm has managed to penetrate. The zygote is formed 24 hours after the egg and sperm nuclei fuse.
What is the first stage of cell division?
Prophase
Prophase is the first stage in mitosis, occurring after the conclusion of the G2 portion of interphase. During prophase, the parent cell chromosomes — which were duplicated during S phase — condense and become thousands of times more compact than they were during interphase.
Which specific region of a zebrafish embryo where the cells of the blastoderm start to spread over the yolk by Epiboly?
B: Dome stage embryo (4.3 hpf), epiboly initiates with yolk cell doming and deep cells rearrange to form an inverted bowl over the yolk. Yolk syncytial nuclei are present both in the internal yolk syncytial layer underneath the blastoderm (i-ysn) and in the external yolk syncytial layer (e-ysn).