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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 and 2

  • 3 and 4

  • 1 and 3

  • 2 and 4

  • 1 only

Explanation

Question 2 of 10 Question 2 of 10

1

Photoreactivation

Select one of the following:

  • Causes a bulge in the DNA helix

  • Utilises UV light for photolyase activity

  • Uses UV light and visible light sequentially

  • Repairs pyrimidine dimers

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

Explanation

Question 3 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:

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

  • 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

  • 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 1 of 10 Question 4 of 10

1

The _ori_T on the plasmid

Select one of the following:

  • Initiates expression of the pilus genes

  • Was the first gene to evolve on the F plasmid

  • Is the origin of gene transfer in conjugation

  • Facilitates phage DNA entry to the recipient

  • Encodes the state of origin helper protein

Explanation

Question 10 of 10 Question 5 of 10

1

All types of Transposable Elements (TEs) have

Select one of the following:

  • Either inverted repeats or long terminal repeats at the ends

  • RNA genomes

  • Antibiotic resistance genes

  • A copy and paste mechanism for movement

  • pol and gag genes

Explanation

Question 7 of 10 Question 6 of 10

1

In cattle, blood groups are

Select one of the following:

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

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

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

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

  • None of the other answers

Explanation

Question 8 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 presence of hybrids that are intermediate between two parent lines

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

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

  • None of the other answers

Explanation

Question 6 of 10 Question 8 of 10

1

Heritability is

Select one of the following:

  • None of the other answers

  • Will have a different value in males and females

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

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

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

Explanation

Question 9 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

  • 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

  • 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

Explanation

Question 5 of 10 Question 10 of 10

1

Heritability

Select one of the following:

  • Is another way of measuring the recombination fraction in cM

  • None of the other answers

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

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

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

Explanation

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