Review for Test this Wednesday

12/12/12Your test will have 20 questions. Be sure to

read the special notes at the end of this review. Enjoy.

Question 1: Identify the mutations

A.

B.

C.

Question 2: Which combination represents a heterozygous individual for a trait?

A. Aa

B. BB

C. aB

D. AB

Question 3: What type of cross is represented in the picture?

A. Incomplete dominance

B. Mutation

C. Crossing over

D. Nondisjunction

Question 4: white fruit color (W) is dominant over yellow fruit color (w) and disk-shaped fruit (D) is dominant over

sphere-shaped fruit (d) (parents: WwDd X WwDd)

Look at the offspring and answer the following.

1. How many are white and disk shaped?

2. How many are white and sphere shaped?

3. How many are yellow and disk shaped?

4. How many are yellow and sphere shaped?

Question 5: Describe frame shift mutations and give the two types of mutations that are frame shifts.

Question 6: Define gametes

Question 7: Where does a mutation need to occur in order to be passed on to the offspring (children)?

Question 8: Black is dominant; brown is recessive. The offspring are 14 black and 14 brown. What are the genotypes of the

parents? Check by making a punnett square.

A. BB × b

B. Bb × Bb

C. Bb × bb

D. BB × Bb 

Question 9: A homozygous tall (TT) is crossed with a homozygous short (tt). What percentage

of the offspring will be tall?

Tall =

Question 10: Cross two heterozygous (Tt) tall plants and find the genotypes and phenotypes.

• Genotype:

• Phenotype:

Question 11: Look at the chart and the parents at the bottom of the chart. If you cross the two parents, which

trait will all the offspring have?

Question 12: Illustrate a deletion mutation in chromosomes. (pg. 308)

• Draw original chromosome here.

• Draw chromosome with deletion mutation here.

Question 13: Black is dominant and white is recessive. Looking at the chart, describe how if the 1st generation (F1) only had black rabbits how did white rabbits show up in the 2nd (F2)

generation?

Question 14: Widow’s peak is dominant and straight hairline is recessive. Dad has widow’s peak; Mom has straight hairline;

child has straight hairline. What is the genotype of dad?

Question 15: Illustrate a translocation mutation in chromosomes. (pg. 308)

• Draw original chromosome here.

• Draw chromosome with translocation mutation here.

Question 16: Which of the following is best supported by the information above?

a. Mutations located on chromosome 17 will result in cancer.

b. Mutated BRCA1 alleles are only one factor involved in cancer.

c. Cancerous growth will cause a mutation in some BRCA1 alleles.

d. Women with a mutant allele of BRCA1 will develop cancer.

Question 17: What type of mutation is represented in the picture below if gene 1 is normal and gene 2 is

abnormal?

Question 18: Looking at the offspring in the punnett square, take a female and cross her with a male.

Genotypes:

Phenotypes:

Special notes:

• All cells in the body contain the same DNA.• Cells undergo differentiation to develop

different organs in the body.• The function of the cell determines which

genes will be expressed.• Genes are regulated to determine which

genes are turned on and off.