so where should we start?. cellular division - mitosis * what are some of the major differences in...
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So where should we start?
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Cellular Division - mitosis
* What are some of the major differences in the cell division of prokaryotic cells compared to eukaryotic cells is?
* Prokaryotic chromosomes do not separate along a mitotic spindle like eukaryotic cells, others?
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Cellular Division – mitosis in eukaryotes
A plant cell has 12 chromosomes at the end of mitosis. How many chromosomes did it have at the beginning of the cell cycle?
C. 12
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Cellular Division – mitosis in eukaryotes
How many chromatids would the plant cell with 12 chromosomes have in the G2 phase of its cell cycle?
D. 24
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Cellular Division - mitosis
Humans have a 2n number of 46. How many chromosomes would be found in each of the following?A. Somatic cells = B. Gametes =
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Cellular Division - meiosis
The restoration of the diploid chromosome number after halving in meiosis is due to
* fertilization
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Cellular Division - meiosis
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Cellular Division - meiosis
Homologous pairs?
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Cellular Division - meiosis
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Cellular Division - meiosis• One homologous pair has ____
number of sister chromatids?
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Cellular Division - meiosis Each sister chromatid has their
own kinetochore
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Cellular Division - meiosis
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27. The restoration of the diploid chromosome number after halving in meiosis is due to
B. fertilization
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Is this organism homozygous or heterozygous? How do you know?
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Heterozygous dihybrid cross L= long ears l = short ears R = red fur r = white fur Long eared, white fur offspring
are eaten more readily by predators. Bummer.
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Evolution
Long eared, white fur offspring are eaten more often by predators.
Let’s assume that all of the offspring of a population with the above stated phenotype got eaten.
What effect does this have on the population?
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Evolution
Nature selects based on phenotype but the impact is at the level of genotype.
• Bacteria are more and more resistant to antibiotics. Why?
• Directional selection by the way
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Evolution
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Evolution
Darwin proposed that new species evolve from ancestral forms by the gradual accumulation of adaptations to changing environments
Explains our unity and diversity
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Evolution
Explain natural selection
the reproductive success of the members of a population best adapted to the environment
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Cell Parts and Function
ReviewTYPICAL ANIMALCELL
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Cell Parts and FunctionsReview Continued
TYPICAL PLANT CELL
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Endomembrane System