PART ONE 1-5

1. In the cross AaBb X aaBb, what are the gametes for AaBb?

2. What is the genotype of a white-eyed male fruit fly?

3. Suppose you count 40 green tobacco seedlings and 2 whitetobacco seedlings in one agar plate. do your results show that bothparent plants were heterozygous for the color allele? Explain youranswer.

4. Suppose that students in the laboratory periods before youremoved some of the purple and yellow corn kernels on the ears ofcorn as they were performing the Experimental Procedure. Whatspecific effects would this have on your results?

5. In the cross AaBb X aaBb, what are the genotypic (notphenotypic) results for this cross (be sure to includenumbers of each)?

PART 2 6-10

6. In the cross AaBb X aaBb, what are the gametes for aaBb?

7. Suppose you count tobacco seedlings in six agar plates, andyour data are as follows: 125 green plants and 39 white plants.What is the phenotypic ratio?

8. If a cross results in 90 long-winged flies to 30vestigial-winged flies, what are the phenotypes of the parents?

9. If you count 52 purple rough corn kernels and 50 yellowsmooth corn kernels, how many purple smooth corn kernels should youexpect to count? How many yellow rough corn kernels should youexpect to count? Explain your reply. (Hint: Remember our calculatedratios from the activity in class. How would you turn those ratiosinto actual counts?)

10. If offspring exhibit a 9:3:3:1 phenotypic ratio, what arethe genotypes of the parental (P) generation?