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| ► Title→ |
Sexual Plasticity and Gametogenesis in
Fishes |
| ►
Author [s]→ |
Balasubramanian
Senthilkumaran |
► Publisher &
Year: |
Nova Science
Publishers, Inc. / 2013 |
► Pages:
تعداد صفحات |
470 |
| ► ISBN→ |
978-1-62618-879-2 |
| ► Description: |
Sex
determination, differentiation and gamete
maturation are well organised molecular
events in vertebrates. In vertebrates, sex
determination and differentiation are two
important events in the development of
gonads (testis or ovary). Sex determination
is the genetic (sex chromosomes) or
environmental process by which the sex (male
or female) of an individual is established.
During embryonic development, primordial
germ cells migrate from the site of origin
to the gonadal primordia where they
differentiate along with somatic cells and
finally form the indifferent/bipotential
gonads. Depending on the action of various
factors the bipotential gonads give rise to
either testis or ovaries. In most
vertebrates, excluding fishes and some
amphibians, the event of sex determination
is controlled genetically and later the
progression of gonadal development is
controlled by hormones and other factors.
Interestingly, these processes in fishes are
controlled not only genetically but also
through hormones or environmental factors.
These characteristics make fish the
champions of sex reversal and serve as
excellent animal models to precisely
understand sexual development. |
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