Genetics Test

1.  If a cell cannot move enough material through its membrane to survive, then the ratio of its surface area to volume is:

  1. too large
  2. just the right size
  3. In the middle
  4. too small

2.  Which statement describes the chromosome shown?

  1. It is made up of four histones
  2. It is made up of four centromeres
  3. It is made up of four chromatids
  4. It is made up of four telomeres

3.  One difference between a cancer cell and a normal cell is that:

  1. normal cells cannot make copies
  2. cancer cells divide uncontrollably
  3. normal cells divide uncontrollably
  4. cancer cells cannot make copies

4.  Two similar chromosomes that you inherit from your parents (one from your mother, one from your father) are called:

  1. sex chromosomes
  2. homologous chromosomes
  3. sister chromatids
  4. homozygous alleles

5.  Mitosis produces cells with how many chromosomes?

  1. 44 c. 23
  2. 22 d. 46

6.  Which of the following cell types is diploid?

  1. somatic cell
  2. ovum
  3. sex cell
  4. gamete

7.  A distinguishing characteristic that can be inherited is a(n)

  1. gene
  2. trait
  3. cross
  4. allele

8.  Which law states that organisms inherit two copies of each gene and donate one copy to each of their offspring?

  1. law of independent assortment
  2. law of inheritance
  3. law of genetic linkage
  4. law of segregation

9.  Mendel knew that the variations in the offspring generations resulted from his experiments because he

  1. controlled the fertilization process
  2. changed the growing conditions
  3. allowed plants to cross-pollinate
  4. ensured that plants self-pollinated

10. Recessive alleles may not be expressed because they are

  1. mask the dominant allele
  2. the most common allele in a population
  3. masked by a dominant allele
  4. the least common allele in a population

11. During Interphase a cell grows, duplicates organelles, and

  1. copies DNA
  2. produces a new cell
  3. divides the nucleus
  4. divides the cytoplasm

12. Growth factors and cyclins:

  1. cause cancer cells to break away
  2. prevent mitosis
  3. cause apoptosis
  4. control the cell cycle

13. Which of the following tools is used to match up chromosome pairs using chemical stains?

  1. meiosis map
  2. linkage map
  3. karyotype
  4. pedigree chart

14. Mendel's second law of genetics, the law of independent assortment, is one explanation of the:

  1. Random fertilization
  2. Genetic variation within species
  3. Dominant alleles are better
  4. Why organisms die

15. Which of the following events is an important factor in increasing variety among sexually reproducing organisms?

  1. fertilization
  2. testcross
  3. crossing over
  4. gene linkage

16. Human height occurs in a continuous range because it is affected by the interaction of several genes, making it a(n)

  1. autosomal trait
  2. sex-linked trait
  3. polygenic trait
  4. codominant trait

17. A female is born with attached earlobes, which is a recessive phenotype. Which of the following genotypes could her parents have?

  1. Rr and rr
  2. Rr and RR
  3. RR and rr
  4. RR and RR

18. Which of the following is true of malignant tumors?

  1. They can cause tumors in other parts
  2. They do not require treatment
  3. They are easily removed
  4. They contain cells that stay clustered together

19. Which statement about the process of binary fission is false?

  1. It takes place in multicellular organisms
  2. It produces genetically identical offspring
  3. It involves the division of cytoplasm
  4. It requires the duplication of DNA

20. What is the name of the process shown in the diagram?

  1. Meiosis
  2. Binary Fission
  3. Mitosis
  4. Regeneration

21. What is the correct order for the process shown in the diagram?

  1. C, B, A, D
  2. B, C, D, A
  3. C, D, B, A
  4. B, C, A, D

22. Describe the events that take place in part B in the diagram.

  1. Nucleus forms
  2. Chromosomes line up in the middle
  3. Sister chromatids move apart
  4. DNA condenses into chromosomes

23. What is the main reason that sex-linked disorders are most often observed in males?

  1. Y chromosome cannot cause genetic disorders
  2. Only X chromosome has genes for gender
  3. Only X chromosome has the genetic disorders
  4. Y chromosome cannot mask alleles on the X

24. Suppose a person is a carrier for a genetic disorder. Which of the following phrases about this person is true?

  1. the allele is not passed on due to Y chromosome inactivation
  2. does not have the disorder but can pass it on
  3. cannot pass on the disorder
  4. will develop the disorder later in life

25. Identify the process shown in Diagram 2.

  1. Mendelis
  2. Mitosis
  3. Mituses
  4. Meiosis

26. Write the letter that corresponds to the cells in the diagram that are haploid.

  1. D
  2. E
  3. H
  4. J

27. Figure 6.4 shows the results of a cross between a plant with a known genotype and a plant of unknown genotype. What is the term for this type of cross?

  1. Monohybrid Cross
  2. Dihybrid Cross
  3. Testcross
  4. True-cross

28. In this plant species, the allele for purple flowers is dominant and the allele for white flowers is recessive. Write the genotype for the offspring that have white flowers.

  1. Ff
  2. FF
  3. ff
  4. ?f

29. Write the genotype for the offspring that have purple flowers.

  1. Ff
  2. FF
  3. ff
  4. ?f

30. Predict the genotype for the parent organism whose genotype is unknown.

  1. Ff
  2. FF
  3. ff
  4. ?f