442014
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Quiz von gina_evans0312, aktualisiert more than 1 year ago
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Erstellt von gina_evans0312
vor mehr als 10 Jahre
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Frage 1
Frage
Sexual reproduction requires the production of gametes containing half the chromosomes of the parent
Antworten
- True
- False
Frage 2
Frage
Mitochondrial DNA comes from the...
Antworten
-
Mother
-
Father
-
Both
Frage 3
Frage
Define Homologous Chromosomes
Antworten
-
Chromosomes of the same length and centromere position with genes for the same characteristics
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Chromosomes of the same length and centromere position with genes for complimentary characteristics
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Chromosomes of the different length/ centromere position with genes for the same characteristics
Frage 4
Frage
What must sister chromatids have?
Antworten
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Two identical replications
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Three identical replications
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Of different chromosomes
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Of the same chromosomes
Frage 5
Frage
How do you get from homologous chromosomes to sister chromatids?
Antworten
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Replication
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Transcription
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DNA degredation
Frage 6
Frage
What is the difference between Meiosis I and Meiosis II?
Antworten
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Meiosis I- Sister chromatids separate Meiosis II- Homologous chromosomes separate
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Meiosis I- Homologous Chromosomes separate Meiosis II- Sister chromatids separate
Frage 7
Frage
In Meiosis I, name two changes to nuclear architecture that assist homologous chromosome pairing
Antworten
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Bouquet formations
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Rabl formations
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Spine formations
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Chiasmata
Frage 8
Frage
Telomere clustering causes Rabl formations
Antworten
- True
- False
Frage 9
Frage
Some organisms have elements that facilitate pairing i.e.
Antworten
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Chromatin
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Heterochromatin
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Homochromatin
Frage 10
Frage
Synaptonemal complexes are found between homologous chromosomes and are thought to facilitate what?
Antworten
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Chromosome pairing
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Chromosome synapsis
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Chromosome recombination
Frage 11
Frage
Chromosome synapsis is the close lying of chromosomes next to each other
Antworten
- True
- False
Frage 12
Frage
The separating of homologous chromosomes is mediated by what?
Antworten
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Synapsis
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Chiasmata
-
Rabl formations
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Helicase
Frage 13
Frage
Other species have specilised linkages - name two examples
Antworten
-
Lewis formations
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Rabl formations
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Achiasmate
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Non exachange
Frage 14
Frage
Cohesin only occurs between sister chromatids
Antworten
- True
- False
Frage 15
Frage
What is the role of cohesin in Meiosis I?
Antworten
-
Holds sister chromatids together
-
Allows chiasmata to occur
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Counteracts microtubule pulling force until the crossover is complete
Frage 16
Frage
What is the role of chiasmata/crossing over in meiosos?
Antworten
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Increases genetic diversity
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Prevents mistakes (i.e. incorrect separation)
-
Increases efficiency of microtubule separation
Frage 17
Frage
In Meiosis I, sister chromatids must go to separate poles
Antworten
- True
- False
Frage 18
Frage
What is the 'Mono-orientation of sister kinetochores?'
Antworten
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Sister chromatids remaining together and travelling to the same pole
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The exchange of DNA between homologous chromosomes
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Sister chromatids separating and travelling to opposite poles
Frage 19
Frage
What is the budding/fission yeast version of 'Mono-orientation of sister kinetochores'?
Antworten
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Monopolin
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Monoferrin
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Monobindin
Frage 20
Frage
We have no idea how Mono-orientation of sister kinetochores occurs in humans
Antworten
- True
- False
Frage 21
Frage
How is Cohesin lost in Anaphase I and II
Antworten
-
Microtubules attach and release separase
-
Separase is released during chiasmata
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Separase is transcribed in the nucleus and diffuses to homologous chromosomes
Frage 22
Frage
During anaphase I, cohesin is lost where?
Antworten
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Between sister chromatids
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At the centromere
Frage 23
Frage
According to Medel's first law of inheritance, what happens to the two alleles present during replication?
Antworten
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They are separated away from each other to opposite poles, so each gamete has only 1 allele, giving a ratio of 2:2 in the gametes
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They are not separated and go to the same pole, so each gamete has two alleles, giving a ratio of 1:1 in the gametes
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They are separated to the same poles, so each gamete has two alleles, giving a ratio of 2:2 in the gametes
Frage 24
Frage
What assumptions are made in the Hardy Weinburg Equilibrium Equation?
Antworten
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Only random mating and gene flow
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No selection
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No mutation
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No meiotic drive
Frage 25
Frage
Mendel's Second Law is The Law Of Segregation
Antworten
- True
- False
Frage 26
Frage
State Mendel's Sencond Law
Antworten
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That alleles are separated from each other so each gamete will possess one allele
-
The order in which the homologous chromosomes line up at the equator is completely random with respect to each other
Frage 27
Frage
Linked genes are much more likely to be separated
Antworten
- True
- False
Frage 28
Frage
Define Linkage Disequilibrium
Antworten
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Genes are found on the same chromosome
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The clustering of telomeres prevents genes from separating
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The occurrence in members of a population, combinations of linked genes in non-random proportions
Frage 29
Antworten
-
A bivalent
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A chiasma
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A bouquet formation
Frage 30
Antworten
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Bivalent
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Chiasma
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Linkage disequilibrium
Frage 31
Antworten
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Homologous Chromosomes
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Sister chromatids
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Recombinant chromatids
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