Research of misconception Cell Division- Mitosis
Group members:SHARIFAH ROQAIYAH D20091034851NGANG HUEY CHI D20091034861YEE HON KIT D20091034822YEE CHIN TIEN D20091034824
Many eukaryotes have two copies of each type of chromosome in their nuclei, so their chromosome complement is said to be diploid. Chromosomes are the genetic units divided by mitosis. Each chromosome is duplicated into two exact copies called sister chromatids during S stages in interphase. Mitosis separates the sister chromatids and places one in each of the two daughter nuclei produced by the division.
The equal distribution of daughter chromosomes to each of the two cells that result from cell division is chromosome segregation.
Scientific Concept
M phase
G1 phase
S phase
G2 phase
Mitotic cell cycle basically
comprised of 4 phases:
Ob
jec
tive Purpose
• This study aims to investigate the effect of drawing method of determining university students’ misconceptions concerning cell division –mitotic cell cycle.
To identify biology student teachers’ misconceptions of cell divisions using drawingsand interviews which they possess about the cell division processes and both the content and scope of these misconceptions.
Drawing
Simple research
instruments
Taps holistic
understanding
An alternative form of expressio
n
Can be completed
quickly, easily and
in an enjoyable
way.
Research Background
1. A total of 124 student teachers, who were
studying to become secondary biology teachers
at the Faculty of Education in Selcuk University
in Turkey.
2. Participants previously had studied cell division
in cytology, genetics, and molecular biology, as
a school subject during various semesters.
Methods
• Biology student teachers’ understanding of the
chromosomes mitosis was examined by two different
methods not mutually exclusive.
• The first method is method of drawing. The
participants were informed about the drawing method
before this application and some practices were
applied about this method.
• The participating students were asked to draw
process of mitosis in a cell on a blank piece of A4-sized
paper.
Cont.• These drawings are analyzed and categorized into
model types corresponding to five levels of
understanding.
1. No drawing
2. Non-representational drawings,
3. Drawings with misconceptions,
4. Partial drawings
5. Comprehensive representation drawings.
Cont.
The second method to examine the university
student’s knowledge is individual interviews.
After the drawings were evaluated, individual
interviews were conducted about the detailed subjects
with 15 randomly chosen who demonstrated
misconceptions.
The purpose was to check the validity of the
interpretation of the drawings. In the interview, these students were asked to respond
to questions like: › What are chromosomes and sister chromatids?› How do the chromosomes act during mitosis?
Research about
misconception of
cell division -mitosis
Examined by two different methods
Method of
drawing, conducte
d with two
phases.
2nd phase,
the question “Draw
process of
mitosis in a cell”
was asked
Analysis of
drawings and
categorized into model types
corresponding to
five levels of understa
nding
1)No drawing 2) Non-
representational
drawings 3)
Drawings with
misconceptions
4)Partial drawings
5) Comprehe
nsive representa
tion drawings
Second method -individua
l intervie
ws.
Conducted about
the detailed subjects with 15 randomly chosen
who demonst
rated misconceptions.
Figure 1. Example of level 2 (non-representational drawing).
Figure 2. Example of level 3 (drawing with misconception).
Figure 3. Examples of level 4 (partial drawing).
Figure 4. Examples of level 5 (comprehensive representation drawing).
Misconception VS
Scientific Idea
Misconception
Scientific Idea
1. Interphase is the resting phase of mitosis.
2. The chromosome number is doubled in the prophase of mitosis and halved in the anaphase of mitosis.
3. In mitosis, homologous chromosomes separate in the anaphase.
4. Sister chromatids do not separate in mitosis.
5. The number of chromosomes is halved after mitosis.
6. The number of chromosomes is doubled after mitosis.
1. Interphase is the first stage in mitotic cell cycle in which the cell grows and replicates its DNA before undergoing mitosis (M phase) and cytokinesis.
2. In the anaphase of mitosis, the spindle separates the two sister chromatids(not chromosome) of each chromosome and moves them to opposite spinde poles.
3. <same as 2>4. <same as 2>5. After mitosis, two daughter cells
are genetic duplicates of the parental cell that entered mitotic division are produced.
6. <same as 5>
Figure 8. A drawing of misconception of “interphase is the resting phase of the mitosis”.
Discussion & Conclusion
Cont. The findings gained from the drawings and the interviews show that a majority of the students cannot establish accurate relationships in mitotic cell cycle and cell division.
The existence of these misconceptions, despite the fact students are educated with various education techniques at the university, shown that such misconceptions are extremely resistant against change.
Cont. Effective teaching methods must be used to eliminate or minimize these misconceptions that the university students possess.
Other techniques Group discussion POE (Predict Observe Explain) Definition Conceptual maps
Summary of drawing &
interview technique1. Drawing activities in conjunction with
individual interviews have been successfully used to explore students’ ideas about abstract concepts, e.g. ’mitosis’.
2. Drawing method in conjunction with interviews have been successfully used to diagnose student’s conceptual understandings and misconceptions about abstract concepts, e.g. ‘cell division- mitotic’.
References Misconceptions of cell division
held by student teachers in biology: A drawing analysis
Scientific Research and Essay Vol. 5 (2), pp. 235-247, 18 January, 2010Available online at http://www.academicjournals.org/SREISSN 1992-2248 © 2010 Academic Journals
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