Common questions

How does fertilization occur step by step?

How does fertilization occur step by step?

To become pregnant, the following steps must occur:

  1. Sperm transport — The sperm must be deposited and transported to the site of fertilization.
  2. Egg transport — Ovulation must occur and the egg must be “picked up” by the tube.
  3. Fertilization and embryo development — Union between the sperm and egg must result.

Where does fertilization occur in animal reproduction?

Fertilization (the union of sperm and egg) usually takes place within the oviducts and the developing embryo is moved toward the uterus for development. It usually takes the egg or embryo a week to travel through the oviduct.

What are the main events of fertilization?

In overview, fertilization can be described as the following steps:

  • Sperm Capacitation.
  • Sperm-Zona Pellucida Binding.
  • The Acrosome Reaction.
  • Penetration of the Zona Pellucida.
  • Sperm-Oocyte Binding.
  • Egg Activation and the Cortical Reaction.
  • The Zona Reaction.
  • Post-fertilization Events.

What type of reproduction do mammals do?

All living organisms reproduce. Mammals reproduce sexually through internal fertilization. Mammals take care of their young ones through production of milk produced by mammary glands of the females.

Where does the fertilization take place in an animal?

Internal Fertilization Most land animals, both invertebrate and vertebrate, use internal fertilization. Internal Fertilization. In mammals, reptiles and birds the gametes meet inside of the female’s body. This is called internal fertilization. All land dwellers need to fertilize this way because sperm still prefer swimming to walking.

How does the fertilized egg become active in a multicellular animal?

In multicellular animals, as a result of this fusion of sex cells, the fertilized egg is said to have become active to start embryonic development.

How does fertilization occur in the female oviduct?

When mammalian eggs and sperm come into contact in the female oviduct, a series of steps is set in motion that can lead to fertilization and ultimately to development of new individuals. The pathway begins with species-specific binding of sperm to eggs and ends a relatively short time later with fusion of a single sperm with each egg.

Which is the correct description of the process of fertilization?

Fertilization, pictured in Figure 24.23 a is the process in which gametes (an egg and sperm) fuse to form a zygote. The egg and sperm each contain one set of chromosomes. To ensure that the offspring has only one complete diploid set of chromosomes, only one sperm must fuse with one egg.

Share this post