Review Sheet for Genetics Exam

Use the following information to answer the following questions

TRAIT

DOMINANT ALLELE

RECESSIVE ALLELE

Height

Tall (T)

Short (t)

Hair Texture

Curly (H)

Strait (h)

Freckles

Freckles (F)

No Freckles (f)

1. Write down 2 genes: ______________________________________________________________

2. Write down 2 alleles: ______________________________________________________________

3. What is a genotype? _______________________________________________________________

4. What is a phenotype? _______________________________________________________________

5. Write down all of the heterozygous genotypes: __________________________________________

6. What is a dominant allele?___________________________________________________________

7. What is a recessive allele? ___________________________________________________________

8. Write down all of the recessive genotypes: _____________________________________________

9. What was Mendel all about?

10. What is the genotype and phenotype when you cross a straight hair with a heterozygous curly hair?

11. What is the genotype and the phenotype when you cross a heterozygous tall, heterozygous freckle-free with a homozygous tall, freckled individual?

Use the following information to answer the following questions

TRAIT

DOMINANT ALLELE

RECESSIVE ALLELE

Height

Tall (T)

Short (t)

Hair Texture

Curly (H)

Strait (h)

Freckles

No Freckles (F)

Freckles (f)

12. You have just found a curly haired organism…show me how you could figure out its genotype.

13. It has just been discovered that freckles is a Y-linked trait. How would this affect the number and type of people that have freckles?

14. You and your spouse have just discovered that you are both carriers for hemophilia. Using genetics, explain what this would mean if you decided to have kids. Would it affect your decision? Explain.

15. You are a genetic counselor and want to advise a couple on whether or not they should have a baby. Both the man and the woman have sickle cell trait. What do you tell them? Would you change your advice if they told you that they were moving to the jungles of central Africa?

16. What is cloning? Describe one way that it is done. Should humans be cloned? Explain your answer.

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