Science 4 Kids science4kids7.gif (5060 bytes)logobook4.GIF (2735 bytes)

"Science and Biotechnology Books Made Simple"

 
Home

About Us

Bookstore

Newsroom

What's New

Fun Stuff

Links

Contact Us

Search

Order Now

 

A

 

 

 

 

 




 

 

 

 

 

 

 

 

 

Case No 2    A Boy or a Girl?

Tom and Mary have three sons: Johnny, Jimmy and Billy. 

PE01644A.gif (2627 bytes)PE02054A.gif (1580 bytes)PE02043A.gif (1873 bytes)

They wish to have a daughter. Mary becomes pregnant. What is the probability that her next baby will be a girl?

bullet

100%

bullet

75%

bullet

50%

bullet

25%

Tom and Mary wanted to know if they are going to have a boy or a girl.  There are two procedures used to find out whether the fetus is a girl or a boy.  One is called Ultrasound, and the other procedure is called Amniocentesis.  Mary decided to have an amniocentesis since it is more accurate.  After two weeks, the results came back. Tom and Mary were thrilled to know that were going to have a baby girl.  What did the technician see under the microscope to determine if Mary was going to have either a boy or a girl?

bullet

Chromosome

bullet

DNA

bullet

Gene

bullet

Bow Tie

What combination of sex chromosomes did the fetus have?

bullet

XY

bullet

XX

 

 Top of Page  j0247695.wmf (422 bytes)

____________________________________________________

Send mail to webmaster@science2discover.com  with questions or comments about this website.
Copyright © 1999-2011, Science2Discover. All rights reserved. Science2Discover® is a trademark of Science2Discover.