× Didn't find what you were looking for? Ask a question
Top Posters
Since Sunday
a
5
k
5
c
5
B
5
l
5
C
4
s
4
a
4
t
4
i
4
r
4
r
4
Home Q & A Board Biology-Related Homework Help Genetics and Developmental Biology
New Topic  
irina irina
wrote...
Posts: 919
Rep: 26 0
11 years ago
What is the difference between an egg, a zygote, an embryo, and a fetus?
Read 18660 times
2 Replies

Related Topics

Replies
wrote...
#1
11 years ago
A zygote is a newly fertilised ovum. With one cell  (when it divides to two it is called a conceptus)

Egg is not really used, before fertilisation it is called on Oocyte, then various names are used depending on what stage of division it is at.

Wiki says that and embryo is used between the age of 0-8 weeks then fetus after that.

http://en.wikipedia.org/wiki/Embryo
wrote...
#2
11 years ago
an egg is a single reproductive cell. it is the female gamete.
a zygote is a fertilized egg (an egg that has combined with a sperm cell).
an embryo is when the zygote starts to grow and divide. it is the earliest stages of life.
a fetus is when the animal is in later stages of development. it is when the offspring starts to resemble an adult and has recognizable features.
New Topic      
Quick Reply
Explore
Post your homework questions and get free online help from our incredible volunteers
  1276 People Browsing
 121 Signed Up Today
Start New Topic Take the Tour CoursesNew Study Tools Topics Trending Browse by Textbook
Related Images
  
 252
  
 920
  
 2959
Your Opinion
Do you believe in global warming?
Votes: 370
Previous poll results: What's your favorite coffee beverage?