SL Genetics Quiz

 

  1. Which enzymes are needed to produce recombinant plasmids that are used in gene transfer?
  2. DNA polymerase and ligase
  3. DNA polymerase and restriction enzymes
  4. Restriction enzymes and ligase
  5. Helicase and restriction enzymes

 

  1. Which process results in the greatest genetic variation in a population?
  2. Meiosis
  3. Mitosis
  4. Cytokinesis
  5. Natural selection

 

  1. Red-green colour blindness is a sex-linked conditioin. Which of the following always shows normal vision?

 

  1. A homozygous male
  2. A homozygous female
  3. A heterozygous male
  4. A heterozygous female

 

 

  1. The diagram below shows chromosomes during prophase I of meiosis. How many chromosomes and chiasmata are visible?

 

Number of chromosomes

Number of chiasmata

A.

2

2

B.

4

2

C.

2

4

D.

4

4

  1. During which phase of the cell cycle to chromosomes duplicate?

 

  1. G1
  2. S
  3. G2
  4. Mitosis
  1. What is the set of alleles that an individual possess?

 

  1. A gene
  2. A genotype
  3. A genome
  4. A genus

 

  1. Which process is used in polymerase chain reaction (PCR)?

 

  1. Transcription
  2. Translation
  3. Replication
  4. Mutation

HL Genetics Quiz

 

  1. What constitutes a linkage group?
  2. Genes carried on the same chromosome
  3. Genes whose loci are on different autosomes
  4. Genes controlling a polygenic characteristic
  5. Alleles for the inheritance of ABO blood groups

 

  1. The allele for red flower colour (R) in a certain plant is co-dominant with the allele for white flowers (R’). Thus a plant with the genotype RR’ has pink flowers. Tall (D) is dominant to dwarf (d). What would be the expected phenotypic ratio from a cross of RR’dd plants with R’R’Dd plants?
  2. 9:3:3:1
  3. 50 % pink 50 % white, and all tall
  4. 1:1:1:1, in which 50 % are tall, 50 % dwarf, 50 % pink and 50 % white
  5. 3:1

 

  1. Two genes A and B are linked together as shown below.

          If the genes are far enough apart such that crossing over between the alleles occurs occasionally, which statement is true of the gametes?

  1. All of the gametes will be Ab and aB.
  2. There will be 25 % Ab, 25 % aB, 25 % ab and 25 % AB.
  3. There will be approximately equal numbers of Ab and ab gametes.
  4. The number of Ab gametes will be greater than the number of ab gametes.

 

  1. Which of the following processes result in the production of recombinants?
  2. Crossing over between linked genes
  3. Reassortment of non-linked genes
  • Mutation

 

  1. I only
  2. I and II only
  3. I and III only
  4. I, II and III

 

  1. In rabbits the allele for long ears (L) is dominant over the allele for short ears (l). The allele for black fur (B) is dominant over the allele for brown fur (b).

 

If two rabbits with the genotypes Llbb and llBb are crossed together, which phenotypic ratio is expected in the offspring?

  1. 9 long-eared black : 3 long-eared brown : 3 short-eared black : 1 short-eared brown
  2. 1 long-eared black : 3 long-eared brown : 3 short-eared black : 9 short-eared brown
  3. 6 long-eared black : 3 long-eared brown : 3 short-eared black : 3 short-eared brown
  4. 1 long-eared black : 1 long-eared brown : 1 short-eared black : 1 short-eared brown

 

  1. A polygenic character is controlled by two genes each with two alleles. How many different possible genotypes are there for this character?
  2. 2
  3. 4
  4. 9
  5. 16
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