× Didn't find what you were looking for? Ask a question
Top Posters
Since Sunday
5
a
5
k
5
c
5
B
5
l
5
C
4
s
4
a
4
t
4
i
4
r
4
Home Q & A Board Biology-Related Homework Help Genetics and Developmental Biology
New Topic  
mike305 mike305
wrote...
Posts: 18
Rep: 0 0
11 years ago
How do you use a punnet square for genetic crosses?
Read 587 times
3 Replies

Related Topics

Replies
wrote...
#1
11 years ago
its like those squares people teach you when you first learn multiplication. you draw a square. split it into sections. then put i think the fathers genes on the top and the mothers on the left side. then after that you match up the boxes. so everything in that row or colomn has the same thing. its kinda hard to explain so...
wrote...
#2
11 years ago
You have a grid with 2 genotypes of the parents on the top and  left side. You carry the alleles over so you have one allele from each genotype to a box. Each box represents the possible genotypes of the offspring. You can find the probability of a certain genotype.
wrote...
#3
11 years ago
A punnet square uses both parents for the baby. So lets say one parent has brown hair dominant and another has red hair recessive. We will use BB for dominant and bb for recessive. We make a box (punnet square) to show the probability of the baby's hair color. We take the B with a b to get a Bb. In this case, all of the fourths are Bb. This means that the baby will have brown hair because Bb is dominant (only because of the B). Hope this helps!
New Topic      
Quick Reply
Explore
Post your homework questions and get free online help from our incredible volunteers
  1197 People Browsing
Start New Topic Take the Tour CoursesNew Study Tools Topics Trending Browse by Textbook
Live Chat
Related Images
  
 27
  
 39
  
 1628
Your Opinion
Which country would you like to visit for its food?
Votes: 204
Previous poll results: Do you trust social media networks with protecting your privacy?