Genetics Test Review

Name______Date ______Period____

Genetics Test Review 2013

1. What is a phenotype? Give an example 7. What does it mean to be dominant?

2. What is a genotype? Give an example 8. True or false: In sex-linked disorders, males are more likely to have the disorder than females. 3. What is the difference between homozygous and heterozygous? 9. True or false: In autosomal disorders, males and females can have the disorder with equal 4. Give an example of a heterozygous genotype. probability.

5. Give an example of a homozygous genotype. 10. What is the definition of a gene? 6. What does it mean to be recessive? 11. What is the definition of genetics?

12. Define Codominance:

13. Define Incomplete dominance:

14. In incomplete dominance, what would the offspring look like if one parent had black fur and the other had white fur?

15. In codominance, what would a furby look like if the mom furby was purple and the dad furby was white?

16. Who is the Father of Genetics?

17. AB blood is an example of which of the following? (there may be more than one correct answer) a. dominant/recessive b. incomplete dominance c. codominance

18. Complete a Punnett square for a person that is heterozygous for A blood with a person that is homozygous for B blood:

What are the possible genotypes of the offspring?

What are the phenotypes of the offspring? 19. Color blindness is a recessive sex-linked gene. Timothy is color blind but his wife is not nor is she a carrier. Draw a punnet square of their possible offspring.

Based on the results:

They have _____out of 4 chance of having colorblind boy, or a _____% chance

They have _____ out of 4 chance of having a colorblind girl or a _____% chance

Fill out the Punnett square to the right : H h 16. What is the genotypic ratio from your Punnett square?

17. Using the Punnet square to the right, what it the H phenotypic ratio?

18. What sex is XX?

19. What sex is Xy? H

20. Colorblindness is a sex-linked disorder. It is indicated by a “b.” If a person’s genotype is XXb ; a. is the person male or female? b. is the person colorblind? c. what special term is used for this person?

21. If a person’s genotype is Xby: a. is the person male or female? b. is the person colorblind?

The following pedigree is for an autosomal disorder. Use it to answer the questions below. I. (P) II. (F1 22. What would the shape look like if a female was heterozygous for theIII. disorder?(F2 Draw it.

23. How many males have the disorder?

24. How many females have the disorder? 25. Which generations have the disorder?

26. How can you tell which child is the oldest?

27. Complete the Punnett square. LR Lr lR lr

LR LLRr LlRR LlRr Lr LlRr Llrr

lR LlRr llRR

lr LlRr

17. Fill in the dihybrid cross for a mom LlRR and dad LLRR

BIOTECHNOLOGY

18. A new strand of DNA formed by the cutting and reattachment of DNA from two different species is called a what?

19. What is a transgenic organism?

20. Making changes in the DNA code of living organisms is called:

21. What is cloning?

22. What do restriction enzymes do?

23. What is the main goal of the Human Genome Project?

24. What are two things that Gel Electrophoresis can be used for?

25. What is polymerase chain reaction (PCR) and what is it used for? 26. The process of attempting to cure genetic disorders by replacing defective or missing genes with copies of healthy genes is known as

27. How can using DNA fingerprinting help in a criminal investigation?

28. Look at the DNA fingerprint pattern shown below. Which sample (B – F) has DNA that is most closely related to Sample A’s DNA?