× Didn't find what you were looking for? Ask a question
Top Posters
Since Sunday
c
6
r
4
c
3
m
3
h
3
1
3
n
3
s
3
d
3
c
3
a
3
r
3
Home Q & A Board Biology-Related Homework Help Genetics and Developmental Biology
New Topic  
rlcdiver11 rlcdiver11
wrote...
Posts: 23
Rep: 0 0
11 years ago
How is a test cross used to distinguish a homozygous dominant condition from a heterozygous condition of the same trait?
Read 598 times
2 Replies

Related Topics

Replies
wrote...
#1
11 years ago
If the condition were heterozygous, the test cross would produce results that included both the dominant and recessive trait.
If the condition were homozygous dominant, the test cross would only produce results of the dominant trait.

That's how the test cross, which is a recessive, is used to distinguish the homozygous dominant from the heterozygous condition of the same trait.
wrote...
#2
11 years ago
A homozygous recessive is used in the test cross:- eg. tt
If TT -  then when  x tt - get all Tt in offspring. 100% dominant phenotypes
If Tt  -  then when x tt - get 50% Tt and 50% tt in offspring. 50% recessive phenotypes and 50% dominant phenotypes.
New Topic      
Quick Reply
Explore
Post your homework questions and get free online help from our incredible volunteers
  1399 People Browsing
Start New Topic Take the Tour CoursesNew Study Tools Topics Trending Browse by Textbook
Live Chat
Related Images
  
 350
  
 3879
  
 326
Your Opinion
Which country would you like to visit for its food?
Votes: 262
Previous poll results: What's your favorite funny biology word?