Gynogenesis is a form of asexual reproduction in fish that requires sperm for egg activation and development, but where the paternal DNA does not contribute to the offspring's genes. The sperm's DNA is destroyed before it can fuse with the egg, so all the genetic information comes from the maternal egg. One method is fertilizing salmonid eggs with ultraviolet-irradiated sperm, which activates the eggs but cannot contribute DNA. Androgenesis is similar but derives the nuclear genes from the father while retaining the mitochondrial DNA from the mother.

1. Gynogenesis
Dr. Karri. Rama Rao

2. Gynogenesis, a form of
Parthenogensis, is a system of
asexual reproduction that
requires the presence of sperm
without the actual contribution
of its DNA for completion. The
paternal DNA dissolves or is
destroyed before it can fuse
with the egg

3. Gynogenesis is a method for
producing fish in which all the
genetic information originates
from the female parent,
i.e., from the egg.
In salmonids, gynogenesis is
accomplished by the fertilization of
the egg with UV-irradiated sperm

6. Androgenesis is a method for
producing fish in which all the
nuclear genetic information
originates from the male
parent (i.e., from the sperm) while
the mitochondrial DNA is still
maternally derived.
Survival of these androgenetic
diploids was much better than
those produced using haploid
sperm.

7. Thank you