With complete dominance, a cross between two heterozygous parents AaBb
produces an expected phenotypic ratio of:
a. 3:1 
b. 9:3:3:1 
c. 1:1 
d. 1:2:1:2:4:2:1:2:1

operator -- 

The quick answer is 9:3:3:1.  

So that you understand the reasoning behind this result, I strongly
suggest that you look at this linked page and read it through,  It is
a set of Mendelian genetics problems published at Kansas State
University.  Your question is included in Problem 2:

Kansas State University: Mendelian Genetics Problems (about halfway down the page)
http://www.ksu.edu/parasitology/biology198/mendel.html


markj-ga

---

Clarification of Answer by markj-ga on 14 Jun 2004 15:19 PDT

operator -- 

I forgot to include my search strategy.  I used the following Google
search to find the information:

phenotypic ration "complete dominance" heterozygous aabb
://www.google.com/search?sourceid=navclient&q=phenotypic+ratio+%22complete+dominance%22++heterozygous+aabb

And this one to efficiently find other sources to confirm it:

phenotypic ratio "complete dominance" heterozygous "9 3 3 1"
://www.google.com/search?hl=en&lr=&ie=UTF-8&safe=off&q=phenotypic+ratio+%22complete+dominance%22++heterozygous+aabb+%229+3+3+1%22&btnG=Search

mark-ga

As the question may appear it looks like I am asking someone to do my
homework for me but the truth is that these questions are from a test
that I failed and I am now seeking other ways to better understand
these concepts.  I have tried to seek other help with my professor but
she has not been responsive.