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Purpose of Mitosis:
growth, repair, replacement, and asexual reproduction
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How does cytokinesis differ between animal and plant cells?
cleavage furrow in animal cells ; cell plate in plant cells
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When does replication occur?
during S stage of interphase
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What is the method used by bacteria to produce more cells?
binary fission
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What is the difference between a benign and malignant tumor?
Benign = one location ; malignant = spreading
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During which phase of mitiosis do the chromosomes line up in the middle?
metaphase
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What is the purpose of meisosis?
to produce haploid gametes
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If an organism has a diploid number of 18, how many chromosomes will be in one of its liver cells?
18
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If an organism has a diploid number of 18, how many chromosomes will be in a gamete?
9
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How many chromosomes does a person with trisomy 21 have in a somatic cell?
47
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In humans, how many sex chromosomes are in a gamete?
1
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What is a zygote?
a fertilized egg
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Why does a seed need to have endosperm?
Stores food for developing embryo
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What is the purpose/function of the flower?
sexual reproduction
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What is the correct order for the following from when the flower blooms?
pollination, fertilization, seed dispersal, germination
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For every cell that begins spermatogenesis, how many sperm are formed?
4
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A fertilized eff is called a
zygote.
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When you eat a fruit you are eating a
ripened ovary
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Genetic variation is due to what three things?
Random fertilization, crossing over, independent assortment
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Where does oogenesis take place?
ovary
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What is non-disjuntion?
when chromosomes do not separate correctly during meiosis resulting in some gametes that have too many chromosomes and gametes with too few.
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What is another term for body cells?
Somatic cells
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How many chromosomes are in a gamete?
The haploid number
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How many autosomes in a human sperm?
22
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When cancer spreads we say it has
metastasized
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What is the function of the polar bodies?
Have a place for the chromosomes to go during the formation of a haploid egg.
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How many sex chromosomes in a human sperm?
1
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