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Biology exam notes: Units on reproduction in plants and animals (sexual & assexual), mitosis & meiosis, growth and cell division
Title: Biology exam notes: Units on reproduction in plants and animals (sexual & assexual), mitosis & meiosis, growth and cell division
Category: Science & Technology / Biology
Details: Words: 2612 | Pages: 11.1 (approximately 235 words/page)
Biology exam notes: Units on reproduction in plants and animals (sexual & assexual), mitosis & meiosis, growth and cell division
BIOLOGY TERM 3
Reproduction
Asexual reproduction
·leads to the production of offspring that are very like their parents and so carry on adaptations to the conditions they live in.
·Does not depend on the production of specialised reproductive cells (gametes)
·Does not depend on the chance meeting of sperm and egg, eg. Aquatic species shed their gametes into the water.
·Does not depend on two mature individuals, one to produce sperm and the other to produce …showed first 75 words of 2612 total…
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…showed last 75 words of 2612 total…Chromosomes condense and become visible
·Spindle apparatus begins to form
·Nuclear membrane disappears
Metaphase
·the spindle fibres attach to the chromosomes
·the chromosomes line up at the spindle equator
Anaphase
·The chromosomes split at the centromere and sister chromatids arc pulled to opposite poles by the spindle fibres
·Chromatids are now independent chromosomes
Telophase
·Chromosomes de-condenses and lengthens
·New nuclear membrane forms
·Usually, the cytoplasm also divides at this stage. This is known as CYTOKINESIS
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