× 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
New Topic  
jdubes jdubes
wrote...
Posts: 710
Rep: 0 0
6 years ago
Which of the following causes Down syndrome?
 
  A) The presence of an extra chromosome on the 21st pair
  B) The presence of only 22 pairs of chromosomes
  C) The presence of more than 23 pairs of chromosomes
  D) The presence of an extra chromosome on the 23rd pair
Read 51 times
1 Reply

Related Topics

Replies
wrote...
6 years ago
A
New Topic      
Explore
Post your homework questions and get free online help from our incredible volunteers
  1333 People Browsing
 131 Signed Up Today
Related Images
  
 175
  
 27107
  
 83
Your Opinion