Meiosis and Mendelian Genetics

Descripción

Year 2 Test sobre Meiosis and Mendelian Genetics, creado por gina_evans0312 el 15/12/2013.
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Test por gina_evans0312, actualizado hace más de 1 año
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Resumen del Recurso

Pregunta 1

Pregunta
Sexual reproduction requires the production of gametes containing half the chromosomes of the parent
Respuesta
  • True
  • False

Pregunta 2

Pregunta
Mitochondrial DNA comes from the...
Respuesta
  • Mother
  • Father
  • Both

Pregunta 3

Pregunta
Define Homologous Chromosomes
Respuesta
  • Chromosomes of the same length and centromere position with genes for the same characteristics
  • Chromosomes of the same length and centromere position with genes for complimentary characteristics
  • Chromosomes of the different length/ centromere position with genes for the same characteristics

Pregunta 4

Pregunta
What must sister chromatids have?
Respuesta
  • Two identical replications
  • Three identical replications
  • Of different chromosomes
  • Of the same chromosomes

Pregunta 5

Pregunta
How do you get from homologous chromosomes to sister chromatids?
Respuesta
  • Replication
  • Transcription
  • DNA degredation

Pregunta 6

Pregunta
What is the difference between Meiosis I and Meiosis II?
Respuesta
  • Meiosis I- Sister chromatids separate Meiosis II- Homologous chromosomes separate
  • Meiosis I- Homologous Chromosomes separate Meiosis II- Sister chromatids separate

Pregunta 7

Pregunta
In Meiosis I, name two changes to nuclear architecture that assist homologous chromosome pairing
Respuesta
  • Bouquet formations
  • Rabl formations
  • Spine formations
  • Chiasmata

Pregunta 8

Pregunta
Telomere clustering causes Rabl formations
Respuesta
  • True
  • False

Pregunta 9

Pregunta
Some organisms have elements that facilitate pairing i.e.
Respuesta
  • Chromatin
  • Heterochromatin
  • Homochromatin

Pregunta 10

Pregunta
Synaptonemal complexes are found between homologous chromosomes and are thought to facilitate what?
Respuesta
  • Chromosome pairing
  • Chromosome synapsis
  • Chromosome recombination

Pregunta 11

Pregunta
Chromosome synapsis is the close lying of chromosomes next to each other
Respuesta
  • True
  • False

Pregunta 12

Pregunta
The separating of homologous chromosomes is mediated by what?
Respuesta
  • Synapsis
  • Chiasmata
  • Rabl formations
  • Helicase

Pregunta 13

Pregunta
Other species have specilised linkages - name two examples
Respuesta
  • Lewis formations
  • Rabl formations
  • Achiasmate
  • Non exachange

Pregunta 14

Pregunta
Cohesin only occurs between sister chromatids
Respuesta
  • True
  • False

Pregunta 15

Pregunta
What is the role of cohesin in Meiosis I?
Respuesta
  • Holds sister chromatids together
  • Allows chiasmata to occur
  • Counteracts microtubule pulling force until the crossover is complete

Pregunta 16

Pregunta
What is the role of chiasmata/crossing over in meiosos?
Respuesta
  • Increases genetic diversity
  • Prevents mistakes (i.e. incorrect separation)
  • Increases efficiency of microtubule separation

Pregunta 17

Pregunta
In Meiosis I, sister chromatids must go to separate poles
Respuesta
  • True
  • False

Pregunta 18

Pregunta
What is the 'Mono-orientation of sister kinetochores?'
Respuesta
  • Sister chromatids remaining together and travelling to the same pole
  • The exchange of DNA between homologous chromosomes
  • Sister chromatids separating and travelling to opposite poles

Pregunta 19

Pregunta
What is the budding/fission yeast version of 'Mono-orientation of sister kinetochores'?
Respuesta
  • Monopolin
  • Monoferrin
  • Monobindin

Pregunta 20

Pregunta
We have no idea how Mono-orientation of sister kinetochores occurs in humans
Respuesta
  • True
  • False

Pregunta 21

Pregunta
How is Cohesin lost in Anaphase I and II
Respuesta
  • Microtubules attach and release separase
  • Separase is released during chiasmata
  • Separase is transcribed in the nucleus and diffuses to homologous chromosomes

Pregunta 22

Pregunta
During anaphase I, cohesin is lost where?
Respuesta
  • Between sister chromatids
  • At the centromere

Pregunta 23

Pregunta
According to Medel's first law of inheritance, what happens to the two alleles present during replication?
Respuesta
  • 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
  • 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
  • They are separated to the same poles, so each gamete has two alleles, giving a ratio of 2:2 in the gametes

Pregunta 24

Pregunta
What assumptions are made in the Hardy Weinburg Equilibrium Equation?
Respuesta
  • Only random mating and gene flow
  • No selection
  • No mutation
  • No meiotic drive

Pregunta 25

Pregunta
Mendel's Second Law is The Law Of Segregation
Respuesta
  • True
  • False

Pregunta 26

Pregunta
State Mendel's Sencond Law
Respuesta
  • 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

Pregunta 27

Pregunta
Linked genes are much more likely to be separated
Respuesta
  • True
  • False

Pregunta 28

Pregunta
Define Linkage Disequilibrium
Respuesta
  • Genes are found on the same chromosome
  • The clustering of telomeres prevents genes from separating
  • The occurrence in members of a population, combinations of linked genes in non-random proportions

Pregunta 29

Pregunta
What is the following showing?
Respuesta
  • A bivalent
  • A chiasma
  • A bouquet formation

Pregunta 30

Pregunta
What is the following showing?
Respuesta
  • Bivalent
  • Chiasma
  • Linkage disequilibrium

Pregunta 31

Pregunta
What is the following highlighting
Respuesta
  • Homologous Chromosomes
  • Sister chromatids
  • Recombinant chromatids
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