Mitosis vs Meiosis Mitosis One division 2 diploid daughter cells Identical to parent cell Mitosis Two divisions 4 haploid daughter cells Genetically different from parent cell httphigheredmcgrawhillcomsites0072495855studentview0chapter28animationhowmeiosisworkshtml ID: 238677
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Slide1
Diagram a cell with four chromosomes going through meiosis.Slide2Slide3
Mitosis vs. Meiosis
Mitosis
One division
2 diploid daughter cellsIdentical to parent cell
MitosisTwo divisions4 haploid daughter cellsGenetically different from parent cell
http://highered.mcgraw-hill.com/sites/0072495855/student_view0/chapter28/animation__how_meiosis_works.htmlSlide4
Nucleus
chromosomesSlide5
Get one small, one medium and one large of each color chromosome.
What do the colors represent?
The Beads? Slide6
Pair up
chromatids
with same size and colorSlide7
Pair up
chromatids
with same size and color
What does this represent?What stage?Haploid or diploid?Slide8
Match homologous chromosomesSlide9
Match homologous chromosomes
What are homologous chromosomes.
Carry the same traits
Each homologous pair has one from each parentSlide10
Demonstrate crossing over during prophase. Slide11
Demonstrate crossing over during prophase. Slide12
Demonstrate metaphaseSlide13
Demonstrate metaphaseSlide14
Demonstrate the first division
Anaphase I and
Telophase
I Slide15
Demonstrate the first division
Anaphase I and
Telophase
I Slide16
Move your cells through the second division. Slide17
Move your cells through the second division. Slide18
How many daughter cells do you have?
Are the daughter cells haploid or diploid?
Are the cells genetically Identical or different from the parent cell? Slide19
4
Haploid
Daughter CellsSlide20
Daughter Cells
Parent
CellSlide21
Possible Combinations of chromosomes
http://highered.mcgraw-hill.com/sites/0072495855/student_view0/chapter28/animation__random_orientation_of_chromosomes_during_meiosis.html
2
n
What does n represent?What was our haploid number of chromosomes?What is the possible number of combinations? 8In people possible 8388608 combinations. Slide22
Sexual Reproduction
Combines the genetic material of two organisms.
Introduces new gene combinations in a population.
Leads to genetic Variability in the population.Gametes produced in meiosis fuse to form a zygote.
Gamete-reproductive cell that contains the haploid set of chromosomes…..sperm and eggZygote- Cell formed from fusion of gametes that contains the diploid set of chromosomes. Slide23
Sexual Reproduction
Methods
External Fertilization: the eggs are fertilized outside of the body
Internal Fertilization: the eggs are fertilized within the female reproductive tract
Conjugation: cells exchange genetic materialProkaryotesSlide24
Asexual Reproduction
Offspring arise from a single parent.
Offspring genetically identical to parent.
More likely to inherit mutations. Leads to less diversity. MitosisSlide25
Asexual Reproduction
Methods
Budding
offspring grows out of the body
of the parent.Spores a reproductive cell capable of developing into a new individualwithout fusion with another reproductive cell. Fissionseparation of the body into two new bodiesSlide26
Quiz
Compare and contrast sexual and asexual reproduction.