1. What Are the Genotypes and Phenotypes of These Parents (P1)?

Norn Genetics

Go to
Click on “Simple Norn Genetics”
Follow prompts and answer the following questions

1. What are the genotypes and phenotypes of these parents (P1)?

2. What are the genotypes and phenotypes of these offspring (F1)?

3. In the F2 generation, how many Norns with hair?

4. In F2, how many Norns without hair

5. Show the Punnett Square of the F1 cross

6. What are the genotypes and phenotypes of these parents (P1)?

7. What do you predict will be the offspring from this cross?

8. How many purple Norns?

9. How many tan Norns?

10. Show the Punnett Square of the F1 cross.

11. What do you expect to be the phenotypes and genotypes of the offspring?

12. What if you crossed these offspring – BbTt x BbTt? Show the Punnett square.

13. List the phenotypic ratios of this cross.

14. How many of each type are shown?

15. Is this the same number you predicted with the Punnett square?

16. Explain why the predicted (Punnett) results might differ from actual results.

Now go back to Original page and Click “Norn Genetics and Sex-Linkage” Click links for all three crosses and answer questions.

MALE X BUG-EYED FEMALE

1. How many males do you have? What type of eyes do the males have?

2. How many females do you have? What type of eyes do the females have?

3. Show the Punnett Square for this cross, make sure to take into account that this is a sex-linked gene.

4. Based on the offspring, is the bug-eyed a dominant or recessive trait?

FEMALE X BUG-EYED MALE

1. How many males do you have? What type of eyes do the males have?

2. How many females do you have? What type of eyes do the females have?

3. Show the Punnett Square for this cross, make sure to take into account that this is a sex-linked gene.

4. Based on the offspring, is the bug-eyed a dominant or recessive trait?

MALE X HETEROZYGOUS

1. How many males do you have? What type of eyes do the males have?

2. How many females do you have? What type of eyes do the females have?

3. Show the Punnett Square for this cross, make sure to take into account that this is a sex-linked gene.

4. Based on the offspring, is the bug-eyed a dominant or recessive trait?

RETURN TO FIRST PAGE AND CLICK ON “NORN GENETICS – MULTIPLE ALLELE TRAIT. CLICK ON EACH OF THE FOUR DIFFERENT EAR TYPES TO SEE HOW THE CROSSES OCCUR. WHEN YOU ARE READY, CLICK ON “QUESTIONS” AND ANSWER QUESTIONS.

1. Of the following traits, determine which is dominant, recessive, or codominant:

a. round ears

b. pointed ears

c. skinny ears

2. Show a Punnett Square of the cross: Round x Pointed

3. Show a cross of: Round x Mixed

4. Show a cross of: Mixed x Mixed

5. Show a cross of: Round x Skinny

6. Show a cross of: Mixed and Skinny