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Meiotic Recombination and Crossing Over

Description

Year 2 Quiz on Meiotic Recombination and Crossing Over, created by gina_evans0312 on 16/12/2013.
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Quiz by gina_evans0312, updated more than 1 year ago
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Created by gina_evans0312 over 10 years ago
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Resource summary

Question 1

Question
During Meiosis I, chromosome structure changes only slightly
Answer
  • True
  • False

Question 2

Question
Which stage of chromosome momvement is this?
Image:
Leptotene_Chromosomes (image/png)
Answer
  • Leptotene
  • Xygotene
  • Diplotene

Question 3

Question
Name this type of chromosome arrangement
Image:
Zygotene_Chromosome (image/png)
Answer
  • Leptotene
  • Zygotene
  • Pacytene

Question 4

Question
What is this stage called?
Image:
Pacytene_Chromosomes (image/png)
Answer
  • Leptotene
  • Pacytene
  • Diplotene

Question 5

Question
Name it
Image:
Diplotene_Chromosome (image/png)
Answer
  • Diplotene
  • Pacytene
  • Leptotene

Question 6

Question
In which stage of chromosome rearrangement are Rabl and Bouquet formations found?
Answer
  • Zygotene
  • Diplotene
  • Pacytene

Question 7

Question
Chromosome movement is vital for pairing
Answer
  • True
  • False

Question 8

Question
Match the word to it's definition- the occurrence of linked genes in non random proportions in members of the population
Answer
  • Linkage disequilibium
  • Mendel's 2nd law
  • The Hardy-Weinberg principle

Question 9

Question
Linkage between two genes can only be broken by _
Answer
  • Crossing over
  • Rabl formations
  • Linkage disequilibrium

Question 10

Question
Genetic Map Distance = % crossing over
Answer
  • True
  • False

Question 11

Question
Genetic Map distance is measured in
Answer
  • centiMorgans (cM)
  • centiMullers (cM)
  • centiMorays (cM)

Question 12

Question
1 cM = ?
Answer
  • 1% crossover recombination
  • 10% crossover recombination
  • 5% crossover recombination

Question 13

Question
% Crossing over = [(No of recombinants/total gametes) x 100] x 2
Answer
  • True
  • False

Question 14

Question
How is meiotic recombination initiated?
Answer
  • Double strand breaks
  • Single strand breaks
  • T-T lesions

Question 15

Question
Which of the following proteins non-randomly damages the DNA in meiotic cells?
Answer
  • Spo11
  • Spo10
  • Spo

Question 16

Question
Once breaks are formed by Spo_, they are monitored by mismatch repair proteins
Answer
  • True
  • False

Question 17

Question
What is the role of mismatch repair proteins?
Answer
  • To monitor induced DNA damage
  • To detect and reverse any incorrect DNA pairings
  • To detect and amplify any incorrect pairings

Question 18

Question
The damage to the DNA is done one chromosome at a time
Answer
  • True
  • False

Question 19

Question
Why are the breaks formed useful?
Answer
  • They ensure meiotic cell machinery is working properly
  • They are a precursor to chiasma
  • They prevent meiosis until the cell is ready
  • Ensure the pairing of homologous chromosomes

Question 20

Question
Meiosis can proceed happily without the DNA damage occuring
Answer
  • True
  • False

Question 21

Question
All chromosomes will get at least once crossover (known as interference)
Answer
  • True
  • False

Question 22

Question
What is the synaptonemal complex?
Answer
  • A structure that formed between homologous chromosomes during meiosis
  • A structure that formed between sister chromatids during meiosis

Question 23

Question
Which of the following are meiosis specific repair proteins?
Answer
  • Spo11
  • EXO1
  • MLH1
  • MLH3
  • Braf
  • C-myc

Question 24

Question
Increasing the distance between two genes decreases the chance of a crossover occurring between them
Answer
  • True
  • False

Question 25

Question
Parent Genotypes are homologous for AB & ab respectively The gametes have the genotypes 35, 15, 15, 35 for AB, Ab, aB and ab respectively How far apart are AB/ab in cM?
Answer
  • 60 cM
  • 15cM
  • 30cM
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