Exam 3 Review
Supplemental Instruction
Iowa State University / Leader: / Shelly
Course: / BIOL 101
Instructor: / Dr. Valenzuela
Date: / 3/2/15
  1. What does a cell need before it divides? Circle all that are correct.
  1. Oxygen
  2. Replicate the DNA
  3. Energy
  4. Sunlight
  5. Duplicate the cytoplasm and organelles
  1. How is a new hair cell made?
  1. Through meiosis
  2. DNA replication
  3. Through mitosis
  4. Hair cells do not replicate, they are irreplaceable
  1. What connects two sister chromatids?
  1. Centriole
  2. Centromere
  3. Kinetochore
  4. Hydrogen bonds
  1. Which is the correct process of mitosis?
  1. Telophase, metaphase, interphase, cytokinesis
  2. Metaphase, anaphase, telophase, cytokinesis
  3. Interphase, prophase, anaphase, cytokinesis
  4. Prophase, metaphase, anaphase, telophase
  1. Mitosis produces______.
  1. 4 diploid identical cells
  2. 2 haploid identical cells
  3. 2 diploid genetically different cells
  4. 2 diploid identical cells
  1. What is the Pacific yew tree good for? Why? What is happening to the this tree population?
  1. What is the first checkpoint in the interphase cycle?
  1. Is there a signal to divide?
  2. Have chromosomes replicated properly?
  3. Is there DNA damage?
  4. Chromosomes aligned for proper chromatid separation?
  1. Can a skin cell go through apoptosis? If yes, when?
  1. Name three drugs that come from plants.
  1. Which outcome benefited cancer patients the most?
  1. Cyclophosphamide + cisplatin
  2. Doxorubicin + cyclophosphamide
  3. Taxol+ cisplatin
  1. Which of the following properties should a promising new ovarian cancer drug have?
  1. Blocks mitosis in noncancerous cells
  2. Blocks mitosis in cancerous cells
  3. Prevents entry into S phase in normal cells
  4. Enhances the activity of cell cycle checkpoints in noncancerous cells
  1. What chromosome is the BRCA1 gene found on?
  1. 17
  2. 23
  3. 13
  4. 15
  1. Which of the following, is a germ-line mutation?
  1. Skin cancer
  2. Smoking
  3. Cystic fibrosis
  1. Name four carcinogens.
  1. What is the function of proto-oncogenes?
  1. Signal cells to pause the cell cycle
  2. Signal cells to progress through the cell cycle
  3. Mutations cause them to be under-expressed or nonfunctional
  4. Induce apoptosis
  1. What is the difference between a malignant and benign tumor?
  1. Benign tumors must be removed through surgery
  2. Malignant tumors can have a blood supply spreading them to the rest of the body
  3. All benign tumors become malignant tumors
  4. It is impossible to get rid of malignant tumors
  1. Which of the following family histories most strongly suggests a risk of inherited breast cancer due to BRCA1 mutations?
  1. Many female relatives who were diagnosed with breast cancer in their 70s
  2. Many relatives with skin cancer
  3. Many relatives diagnosed with skin cancer at an early age
  4. Many female relatives diagnosed with breast cancer at an early age
  5. Many female relatives with both early breast cancer and ovarian cancer
  1. True/ False: All skin cells are haploid.
  2. Give an example of homologous and heterozygous chromosomes. Which is dominant or recessive?
  1. Your height is an example of
  1. Phenotype
  2. Genotype
  3. Gametes
  4. Not inherited from your parents
  1. Complete the chart: Draw pictures of each step.

Prophase
Metaphase
Anaphase
Telophase
  1. Which of the following is the correct cycle of fetal development?
  1. Embryo, fertilization, zygote, fetus
  2. Fertilization, embryo, zygote, fetus
  3. Fertilization, zygote, fetus, embryo
  4. Fertilization, zygote, embryo, fetus
  1. Why do you and your siblings not have identical genes even though you came from the same parents? There are two reasons we talked about in class.
  1. The father has cystic fibrosis, the mother is a carrier. What percentage chance do they have for having a child with cystic fibrosis?
  1. If this couple did not want to take their risk of having a child with cystic fibrosis. What would you recommend to this couple?
  1. True/False: The mother determines the sex of a child.
  1. Label the following as recessive or dominant traits.

Chin cleft

Tay sachs

Freckles

Dimples

Cystic fibrosis

Huntington disease

Polydactyly

Sickle-cell

Albinism

  1. How do the two alleles of the CFTR gene in a lung cell differ?
  1. They were inherited from different proteins
  2. One is on chromosome 7 and one is on chromosome 3
  3. Only one is expressed
  4. All of the above
  5. There is no difference because both are the same gene
  1. How many alleles are in a liver cell?
  1. 36
  2. 42
  3. 2
  4. 1
  1. How many alleles are in a gamete?
  1. 1
  2. 2
  3. 42
  4. 21
  1. What is the genotype of a person with cystic fibrosis?
  1. Homozygous dominant
  2. Homozygous recessive
  3. Heterozygous
  4. Any of the above
  1. Can cystic fibrosis be diagnosed prenatally? Explain.
  1. What hormone do ovaries produce?
  1. Testosterone
  2. Serotonin
  3. Dopamine
  4. Estrogen
  1. True/False: Father pass their Y chromosome to their daughters.
  2. What happens when there is a mutation on the Y chromosome in the SRY gene?
  1. The embryo will develop into a female
  2. The embryo will have undeveloped gonads
  3. The embryo’s brain will not develop fully
  4. The embryo will not have any testosterone
  1. What is the condition called when people have XX chromosomes and have male genitals?
  1. Congenital medulla hypoplasia
  2. Klinefelter syndrome
  3. Autosomal malfunction
  4. Congenital adrenal hyperplasia
  1. What are the characteristics of XXX chromosome?
  1. Male
  2. Infertile
  3. Fertile
  4. Shorter than average
  1. What are the characteristics of klinefelter syndrome?
  1. Ovaries
  2. Testes
  3. Female
  4. XYY
  1. What is a pedigree?
  1. What is special about a father passing a Y chromosome to their sons?
  1. A white flower pollinizes a red flower. What will the resulting flower color be from incomplete dominance?
  1. Red
  2. White
  3. Red and white spotted
  4. Pink
  1. A white chicken is bred with a black chicken. What will the offspring be from codominance?
  1. Black
  2. Black and white spotted
  3. White
  4. Grey
  1. Which type of blood is the universal donor? Why?
  1. AB
  2. A
  3. B
  4. O
  1. Describe an example of continuous variation.
  1. Health is an example of: Why?
  1. Polygenic trait only
  2. Multifactorial inheritance only
  3. Both
  1. If you have A positive blood, who can you safely donate blood to? Who can you receive blood from?
  1. When looking at a karyotype, to diagnose trisomy 21 in a fetus, is it possible to use that analysis also to tell if the fetus has inherited a cystic fibrosis allele from a carrier mother?