Test
GEGE2001 Quiz 3
Preguntas del test (10)
1DNA 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- A2 and 4
- B3 and 4
- C1 and 2
- D1 and 3
- E1 only
2Photoreactivation
- ADoes not occur in humans due to the use of sunscreens
- BCauses a bulge in the DNA helix
- CRepairs pyrimidine dimers
- DUtilises UV light for photolyase activity
- EUses UV light and visible light sequentially
3Siamese cats show a range of coat colours on a single individual because:
- ACoat colour is a polygenic trait with many genotypes possible in the breed
- BThe breed was originally formed by the mating of a pale coat cold-climate cat and a brown coat warm-climate cat
- CFrequent somatic mutation occurs in the TYR genes when cats are not kept warm
- DCats arise from the fusion of 2 or more zygotes causing genetic mosaicism
- EThey are homozygous for a missense mutation in TYR that produces a heat sensitive tyrosinase protein
4The _ori_T on the plasmid
- AFacilitates phage DNA entry to the recipient
- BWas the first gene to evolve on the F plasmid
- CInitiates expression of the pilus genes
- DIs the origin of gene transfer in conjugation
- EEncodes the state of origin helper protein
5All types of Transposable Elements (TEs) have
- AEither inverted repeats or long terminal repeats at the ends
- BA copy and paste mechanism for movement
- Cpol and gag genes
- DRNA genomes
- EAntibiotic resistance genes
6In cattle, blood groups are
- ANone of the other answers
- BQuantitative traits as there are discrete classes of cattle in the population
- CQualitative traits as there are not discrete classes of progeny as a result of various matings
- DQuantitative traits as there are discrete classes of progeny as a result of various matings
- EQualitative traits as there are discrete classes of progeny as a result of various matings
7Transgressive segregation is
- AThe presence of hybrids that are intermediate between two parent lines
- BThe origin of F2 and subsequent progenies which are intermediate between two parent types
- CThe origin of F2 and subsequent progenies which are either superior or inferior to the parents they are derived from
- DThe presence of hybrids that are superior to the best parent
- ENone of the other answers
8Heritability is
- AWill have a different value in males and females
- BNone of the other answers
- CSpecific to a trait in a population in a specific environment
- DFor a particular breed of animals has the same value for all quantitative traits
- ECan only have a maximum value of 0.5 or 50%
9Heterosis is
- AThe presence of hybrids that are intermediate between two parent lines
- BNone of the other answers
- CThe origin of F2 and subsequent progenies which are intermediate between the two parent types
- DThe origin of F2 and subsequent progenies which are either superior or inferior to the parents they are derived from
- EThe presence of hybrids that are superior to the best parent
10Heritability
- AIs the chi-squared value in testing a 3:1 ratio
- BNone of the other answers
- CIs not related to the statistical relationship between the trait measures in various relatives
- DCan be measured by the regression of the trait in the offspring and their parents
- EIs another way of measuring the recombination fraction in cM
Información
- Descripción
- I got 100%
- Autor
- Michael Jardine
- Idioma
- English
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