Sex differentiation mechanism, Biology

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

Plant might be adapted to a hot dry environment, Give three ways in which a...

Give three ways in which a plant might be adapted to a hot dry environment. A plant might be adapted to a hot dry environment by having a decreased leaf area, waxy cuticle to

Phenotypic classes, 1. A pure-breeding black, smooth guinea pig was mated t...

1. A pure-breeding black, smooth guinea pig was mated to a pure-breeding white, rough female. They produced several litters, and eventually, five males and twenty females resulted

What is signifying by suction force of the plant cell, Q. What is signifyin...

Q. What is signifying by suction force of the plant cell? Does the suction force facilitate or make difficult the entry of water into the cell? The suction force (SF) is the os

What is streatorrhoea, Q. What is Streatorrhoea? Streatorrhoea is more ...

Q. What is Streatorrhoea? Streatorrhoea is more common in Crohn's disease due to heal resection. This may favour calcium-fatty acid complex formation and increased excretion. I

Explain elephant trunk technique in aortic aneurysm, Explain Elephant Trunk...

Explain Elephant Trunk Technique in Aortic Aneurysm ? Elephant Trunk Technique : When aneurysm involves arch of the aorta and large portion of descending thor

Disorders of pancreas, DISORDER S OF THE PANCREAS - (i ) Diabetes me...

DISORDER S OF THE PANCREAS - (i ) Diabetes mellitus (Hypoinsulinism) The insulin-dependent diabetes mellitus (IDDM) is caused by a failure of the Beta-cells to produc

Groups of living beings that form the protist kingdom, Q. Which are the gro...

Q. Which are the groups of living beings that form the protist kingdom? The protist kingdom includes algae and protozoans. (Two groups of fungi with similar characteristics to

Syngamy, Syngamy The pollen tube grows to a very limited extent in the...

Syngamy The pollen tube grows to a very limited extent in the synergid. It releases the contents either through a terminal or a subterminal pore. The contents include the two

Explain sound production - ethological approach in taxonomy, Explain Sound ...

Explain Sound production - Ethological Approach in Taxonomy The most used, ethological feature in identification is the sound produced by various species of animals. This is

Assigment, describe food procurement and digestion in ciliates.

describe food procurement and digestion in ciliates.

Write Your Message!

Name

Email id

Message

Verfication Code

User Account

All Pages