dev2011 2015 week 3 lecture review questions student
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Developmental biology Monash UniversityTRANSCRIPT
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DEV2011 Practical Week 3 Lecture Review Questions These questions relate to lecture material from Week 2. Complete the questions prior to your Practical Class in Week 3, where the answers will be reviewed. These are NOT assessed.
Lecture 4) Evo-‐devo and model organisms Question 1: Rate the following pairs in terms of evolutionary distance from closest to most distantly related (number them from 1 closest to 5 most distant) A. human and zebrafish (D. rerio) ____ B. human and yeast (S. cerevisiae) ____ C. human and mouse (M. musculus) ____ D. human and chicken (G. gallus) ____ E. human and roundworm (C. elegans) ____ Question 2: List 2 reasons why model organisms are useful in developmental biology 1. _______________________________________ 2. _______________________________________ Question 3: List 3 commonly used model organisms in developmental biology 1. ___________________ 2. ___________________ 3. ____________________ Question 4: If you wanted to study the development of the mammalian spinal column, which organism would you choose? 1) Yeast (S. cerevisiae) 2) Mouse (M. musculus) 3) Fruitfly (D. melanogaster) 4) Human (H. sapiens) 5) Any of the above Question 5: Why did you choose your answer above? _______________________________________________________________
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Lecture 5) Fertilisation and embryo cleavage
Question 1: In humans, how long does it take from fertilisation to hatching/implantation? _________________________________________________________________ Question 2: At which stage or number of cells (blastomeres) of the early embryo is it thought that cell specialisation has begun, in other words, when is it that cells of the embryo are no longer “equal”? _____________________________ Question 3: Which term describes the cells produced by cleavage of the zygote? _______________________________________________________________ Question 4: List 3 events that occur once the sperm head contents have entered the egg 1._____________ 2._______________ 3._______________ Question 5: What is the “slow block to polyspermy”? _______________________________________________________________
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Lecture 6) Embryo and gastrulation Question 1: Write numbers 1 to 5 in the boxes below to indicate the order of development (earliest to latest):, morula, foetus, blastocyst, 4-‐cell embryo, fertilised egg 1._____________ 2._______________ 3._______________ 4._____________ 5._________________ Question 2: What are the 3 germ layers? 1.__________________ 2. __________________ 3._________________ Question 3: From the 3 germ layers you have listed above, list one cell type that develops from that germ layer: 1.__________________ 2. __________________ 3._________________ Question 4: What does “nodal flow” do? _________________________________________________________ Question 5: What is suggested to be the most important event in your life? ___________________________________