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Michael Jardine
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Michael Jardine
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GEGE2001 Quiz 3

Question 4 of 10 Question 1 of 10

1

DNA replication:
1. Was first observed in Darwin’s finches
2. Must be accurate in order to transmit the genome to the next generation
3. Is accurate in germ cells and error prone in somatic cells
4. Must include some errors in order to produce variation

Select one of the following:

  • 1 only

  • 1 and 3

  • 3 and 4

  • 1 and 2

  • 2 and 4

Explanation

Question 10 of 10 Question 2 of 10

1

Photoreactivation

Select one of the following:

  • Uses UV light and visible light sequentially

  • Causes a bulge in the DNA helix

  • Repairs pyrimidine dimers

  • Utilises UV light for photolyase activity

  • Does not occur in humans due to the use of sunscreens

Explanation

Question 1 of 10 Question 3 of 10

1

Siamese cats show a range of coat colours on a single individual because:

Select one of the following:

  • Coat colour is a polygenic trait with many genotypes possible in the breed

  • They are homozygous for a missense mutation in TYR that produces a heat sensitive tyrosinase protein

  • Frequent somatic mutation occurs in the TYR genes when cats are not kept warm

  • The breed was originally formed by the mating of a pale coat cold-climate cat and a brown coat warm-climate cat

  • Cats arise from the fusion of 2 or more zygotes causing genetic mosaicism

Explanation

Question 6 of 10 Question 4 of 10

1

The _ori_T on the plasmid

Select one of the following:

  • Encodes the state of origin helper protein

  • Is the origin of gene transfer in conjugation

  • Was the first gene to evolve on the F plasmid

  • Facilitates phage DNA entry to the recipient

  • Initiates expression of the pilus genes

Explanation

Question 7 of 10 Question 5 of 10

1

All types of Transposable Elements (TEs) have

Select one of the following:

  • RNA genomes

  • Either inverted repeats or long terminal repeats at the ends

  • A copy and paste mechanism for movement

  • Antibiotic resistance genes

  • pol and gag genes

Explanation

Question 3 of 10 Question 6 of 10

1

In cattle, blood groups are

Select one of the following:

  • Quantitative traits as there are discrete classes of cattle in the population

  • None of the other answers

  • Quantitative traits as there are discrete classes of progeny as a result of various matings

  • Qualitative traits as there are discrete classes of progeny as a result of various matings

  • Qualitative traits as there are not discrete classes of progeny as a result of various matings

Explanation

Question 9 of 10 Question 7 of 10

1

Transgressive segregation is

Select one of the following:

  • The origin of F2 and subsequent progenies which are either superior or inferior to the parents they are derived from

  • The origin of F2 and subsequent progenies which are intermediate between two parent types

  • The presence of hybrids that are intermediate between two parent lines

  • The presence of hybrids that are superior to the best parent

  • None of the other answers

Explanation

Question 2 of 10 Question 8 of 10

1

Heritability is

Select one of the following:

  • None of the other answers

  • Can only have a maximum value of 0.5 or 50%

  • For a particular breed of animals has the same value for all quantitative traits

  • Will have a different value in males and females

  • Specific to a trait in a population in a specific environment

Explanation

Question 5 of 10 Question 9 of 10

1

Heterosis is

Select one of the following:

  • The presence of hybrids that are intermediate between two parent lines

  • None of the other answers

  • The origin of F2 and subsequent progenies which are either superior or inferior to the parents they are derived from

  • The origin of F2 and subsequent progenies which are intermediate between the two parent types

  • The presence of hybrids that are superior to the best parent

Explanation

Question 8 of 10 Question 10 of 10

1

Heritability

Select one of the following:

  • Can be measured by the regression of the trait in the offspring and their parents

  • Is the chi-squared value in testing a 3:1 ratio

  • Is not related to the statistical relationship between the trait measures in various relatives

  • None of the other answers

  • Is another way of measuring the recombination fraction in cM

Explanation

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