Login

Join for Free!
118317 members


Help: Beginning of Human Life

Human Anatomy, Physiology, and Medicine. Anything human!

Moderator: BioTeam

Help: Beginning of Human Life

Postby scytale » Thu Sep 06, 2007 4:07 pm

What provides the original zygote the instructions to develop into a human? Is it just the DNA or is there something else involved?
scytale
Garter
Garter
 
Posts: 7
Joined: Thu Sep 06, 2007 2:34 pm

Postby kotoreru » Thu Sep 06, 2007 4:19 pm

Ooooh no....what a question. DNA is what makes us what species we are.
"What are humans if they don't learn at University? Animals, yes."

^^One of my ex-girlfriends said that. I stress the ex part.
User avatar
kotoreru
Coral
Coral
 
Posts: 400
Joined: Thu Apr 12, 2007 9:25 pm
Location: London

Postby MrMistery » Thu Sep 06, 2007 6:21 pm

not really. Wikipedia or google "cytoplasmic determinants"
"As a biologist, I firmly believe that when you're dead, you're dead. Except for what you live behind in history. That's the only afterlife" - J. Craig Venter
User avatar
MrMistery
Inland Taipan
Inland Taipan
 
Posts: 6832
Joined: Thu Mar 03, 2005 10:18 pm
Location: Romania(small and unimportant country)


Postby scytale » Fri Sep 07, 2007 2:18 pm

I'm having trouble finding anything good on cytoplasmic determinants. Could you either give me a good website or give me some sort of explanation?
scytale
Garter
Garter
 
Posts: 7
Joined: Thu Sep 06, 2007 2:34 pm

Postby MrMistery » Fri Sep 07, 2007 7:45 pm

"As a biologist, I firmly believe that when you're dead, you're dead. Except for what you live behind in history. That's the only afterlife" - J. Craig Venter
User avatar
MrMistery
Inland Taipan
Inland Taipan
 
Posts: 6832
Joined: Thu Mar 03, 2005 10:18 pm
Location: Romania(small and unimportant country)

Postby scytale » Sun Sep 09, 2007 9:54 am

thanks for the links.

what in its makeup differentiates a totipotent cell from a non-totipotent cell?
scytale
Garter
Garter
 
Posts: 7
Joined: Thu Sep 06, 2007 2:34 pm

Postby MrMistery » Sun Sep 09, 2007 6:21 pm

Good question. No simple answer really. A cell that has lost its totipotence has begun the process of determination. It has to do with gene expression. This is a delicate subject because some cells can regain their totipotence...
"As a biologist, I firmly believe that when you're dead, you're dead. Except for what you live behind in history. That's the only afterlife" - J. Craig Venter
User avatar
MrMistery
Inland Taipan
Inland Taipan
 
Posts: 6832
Joined: Thu Mar 03, 2005 10:18 pm
Location: Romania(small and unimportant country)

Postby mith » Sun Sep 09, 2007 8:19 pm

A nobel prize question
Living one day at a time;
Enjoying one moment at a time;
Accepting hardships as the pathway to peace;
~Niebuhr
User avatar
mith
Inland Taipan
Inland Taipan
 
Posts: 5345
Joined: Thu Jan 20, 2005 8:14 pm
Location: Nashville, TN

Postby MrMistery » Mon Sep 10, 2007 5:21 am

Not quite. I think that we do know how this occurs. It's just that the answer takes a 5-volume book
"As a biologist, I firmly believe that when you're dead, you're dead. Except for what you live behind in history. That's the only afterlife" - J. Craig Venter
User avatar
MrMistery
Inland Taipan
Inland Taipan
 
Posts: 6832
Joined: Thu Mar 03, 2005 10:18 pm
Location: Romania(small and unimportant country)

Postby scytale » Mon Sep 10, 2007 11:07 am

how would cells regain their totipotency?
scytale
Garter
Garter
 
Posts: 7
Joined: Thu Sep 06, 2007 2:34 pm

Postby MrMistery » Mon Sep 10, 2007 12:18 pm

i told you, there is no simple answer to this. pick up a book on genetics and development and start reading. After many many hours of reading you will probably understand it.
"As a biologist, I firmly believe that when you're dead, you're dead. Except for what you live behind in history. That's the only afterlife" - J. Craig Venter
User avatar
MrMistery
Inland Taipan
Inland Taipan
 
Posts: 6832
Joined: Thu Mar 03, 2005 10:18 pm
Location: Romania(small and unimportant country)


Return to Human Biology

Who is online

Users browsing this forum: No registered users and 3 guests