mon 2/25 week-8 topic: meiosis wrap-up obj :...
TRANSCRIPT
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MON 2/25 week-8TOPIC: MEIOSIS WRAP-UP OBJ : 7-10
DO NOW:
EXT: --- DUE DATE: ---
DW: OBJ 7-10
10.1 QUIZ TMRW FEB 26
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EXIT: CIRCLE LEVEL of UNDERSTANDING
[see slide]
HANDOUTS to PICK-UP:
-10.1 APP NTS
TURN IN to ABS box:
-SEMINAR :
-BEFORE SCHOOL/RAVEN-50:
DW- 10.1 WEBQUEST
-10.1 APP NTS / REVIEW
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AG
EN
DA
AB
SEN
T
GENERAL
NONE
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10.1 VIDEO LESSON- Ed Puzzle
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MON
10.1 WEBQUEST
Write this in
RED PEN
RED X in BOX
PEER #
DW GRADE: 2 1.5 1 0
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DW -GRADE RUBRIC
2-WHAT IS EXPECTED-100% COMPLETION with EFFORT
-FRONT SIDE FULLY COMPLETE
1-NOT QUITE WHAT IS EXPECTED-50-99% COMPLETION with EFFORT
-
0-NOT WHAT IS EXPECTED- <50% COMPLETED
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10.1 WEBQUEST
FILE DAILY
WORK
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WEEK IN REVIEW
TURN IN WEEK 7
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UNIT OBJECTIVES
10.1 MEIOSIS
7-DESCRIBE / RECOGNIZE the events of each stage of meiosis
8-EXPLAIN the reduction of chromosome number that occurs during meiosis
9-EXPLAIN the importance of meiosis in providing genetic variation
SUMMARY
*10---COMPARE/CONTRAST MITOSIS/MEIOSIS
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10.1 APP NTS
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COLLABORATIVE GROUP EXPECTATIONSIDENTIFY ROLES [write # TOP RIGHT CORNER]
LAB GROUP(3-5 students)
-working TOGETHER as a collaborative group to COMPLETE TASK
-EVERYTEAM MEMBER has a job and participates EQUALLY
1-READ THROUGH EACH TASK (silently or together)
2-DISCUSS (use POSITIVE communication)
EVIDENCE [highlight supportive evidence]
3-ANSWER [when all members agree]
4-MOVE ON (only when ALL team members understand)
QUESTIONS ?’s
-each other
CLARIFICATION
-Asking Mrs. Paepke for clarification NOT answers.
FYI
-discussion within COLORED group ONLY
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10.1 APP NTS
-RED PEN out for REVIEW
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MAIN IDEA
-MEIOSIS produces HAPLOID GAMETES
-cell division that REDUCES the # of chromosomes by half through
the separation of homologous chromosomes.
Cell Division and the Cell Cycle
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Meiosis – mouse testes
Parent cell
4 gametes
1st division
2nd division
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CHROMOSOMES and CHROMOSOME #
IDENTIFY: three characteristics that are the same in each
member of a pair of homologous chromosomes
SAME DIFFERENT
1- 1-
2-
3-
length
centromere position
position of genes
ALLELE-exact version [code] of each gene
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CHROMOSOMES and CHROMOSOME #
DRAW/LABEL homologous chromosomes /sister chromatids
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MEIOSIS I / MEIOSIS II
IDENTIFY: the phases of MI and MII
PI T2 INTERPHASE AIP2
TI A2 MI M2
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MEIOSIS I / MEIOSIS II
PI
-chromosomes condense/pair up
-spindle fibers form
-homologous chromosomes pair
-crossing over occurs
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MEIOSIS I / MEIOSIS II
MI
-spindle fiber attach to centromere
-pull HC pairs to center
-random assortment of HC
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MEIOSIS I / MEIOSIS II
AI
-chromosome move apart
-separate homologous pairs
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MEIOSIS I / MEIOSIS II
T1
-HC of each pair move to opposite ends
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MEIOSIS I / MEIOSIS II
P2
-chromosomes condense/pair up
-spindle fibers form
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MEIOSIS I / MEIOSIS II
M2
-haploid # of chromosome line up at center
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MEIOSIS I / MEIOSIS II
A2
-sister chromatids pulled apart
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MEIOSIS I / MEIOSIS II
T2
-cell divides into 4 different haploid cells
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MEIOSIS I / MEIOSIS II
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MEIOSIS I / MEIOSIS II
COMPARE/CONTRAST: the phases of MI and M2PI
-chromosomes condense/pair up
-spindle fibers form
-homologous chromosomes pair
-crossing over occurs
MI
-spindle fiber attach to centromere
-pull HC pairs to center
-random assortment of HC
AI
-chromosome move apart
-separate homologous pairs
T1
-HC of each pair move to opposite ends
P2
-chromosomes condense/pair up
-spindle fibers form
M2
-haploid # of chromosome line up
at center
A2
-sister chromatids pulled apart
T2
-cell divides into 4 different haploid
cells
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MEIOSIS I / MEIOSIS II
ANALYZE: the chart above to determine the phase when
CROSSING OVER can occur.
Mark a STAR on the correct phase
PROPHASE I
10.1 Meiosis Square Dance.wmv
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SEXUAL v ASEXUAL REPRODUCTION
EXPLAIN how MEIOSIS and FERTILIZATION produce
genetic variation during SEXUAL REPRODUCTION
Prophase1- crossing over
-trade pieces of genetic material [ALLELES]
Metaphase1- independent assortment:
-random sorting of chromosomes lined up at equator
Fertilization -increases genetic variation further by combining
genetic info from 2 different individuals
-only 1 sperm out of 1,000s will fertilize 1 egg
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SEXUAL v ASEXUAL REPRODUCTION
COMPARE:
asexual reprod
genes
sexual reprodgenetic diversity
protists animals plants
mammals
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EXITCIRCLE-level of understanding of today’s objective
Q’s / clarifications-EXIT- NONE