Sex differentiation mechanism, Biology

Assignment Help:

SEX DIFFERENTIATION MECHANISM -

Primitive gonads are identical in both sexes upto 6 weeks of gestation pressure.
This gonad is known as bipotential primordial gonad. It is differentiated into cortex and medulla.
Formation & devlopment of gonad is gonadogenesis.
In male devlopement of testes is controlled by Y-chromosome.
Testicular differentiation begins in the 7th week of gestation.
Differentiation of ovaries occur later in female in comparision to male or testes. It begins int he 11th or 12rh week of gestation under control of XX chromosomes.
Testes descend down in scrotum in 7th - 8th month. Ext. genitilia appear in male by the 5th month.

Related Discussions:- Sex differentiation mechanism

Nominalistic species concept, The nominalists deny the existence of Plato's...

The nominalists deny the existence of Plato's "types". For them only individuals exist. Species are man-made artificial abstractions. But naturalists, the biologists who have actua

Behavioural adjustments, Behavioural Adjustments When faced with a su...

Behavioural Adjustments When faced with a sudden temperature change, most animals make behavioural responses that enable them to avoid extreme or lethal conditions. Among the

What are the risks of migration, What are the Risks of migration Eg ...

What are the Risks of migration Eg Getting lost (blown off course or similar) and the effect of this when there is a limited fuel supply. Insufficient food to build

Explain lyases, Explain lyases These enzymes (code EC 4) cleave C-C, C...

Explain lyases These enzymes (code EC 4) cleave C-C, C-O, C-N and other bonds by elimination, forming double bonds or conversely adding groups to double bonds. Common names

Concept of species, Many definitions of species have been offered, but none...

Many definitions of species have been offered, but none of them proved to be satisfactory. The definitions did not categorically provide the basis to decide whether two similar gro

PHYLUM ANNELIDA, GERENAL CHARACTERICS OF PHYLUM ANNELIDA

GERENAL CHARACTERICS OF PHYLUM ANNELIDA

State in brief about the neuropsychological tests, State in brief about the...

State in brief about the Neuropsychological tests Neuropsychological tests have to be constructed using the psychometric approach the interpretation of test performance would n

Fisson, what is mean by fisson

what is mean by fisson

Define descending type of paper chromatography, Define Descending type of p...

Define Descending type of paper chromatography? In descending chromatography, the movement or flow of mobile phase is in downward direction. In this technique the solvent is ke

Explain precautions for detection of metanil yellow, Explain Precautions fo...

Explain Precautions for Detection of Metanil Yellow? 1. One should be careful while using concentrated HCl otherwise it may result in burn. 2. Amount of concentrated HCl in

Write Your Message!

Name

Email id

Message

Verfication Code

User Account

All Pages