Mitosis

Descripción

GCSE Biology and Physics Fichas sobre Mitosis, creado por Keera el 11/11/2014.
Keera
Fichas por Keera, actualizado hace más de 1 año
Keera
Creado por Keera hace alrededor de 10 años
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Resumen del Recurso

Pregunta Respuesta
What does cell division allow our cells to do? Survive and grow
How many pairs of chromosomes are there in the human body? 23
How many copies of each chromosome does the human body have? 2
Where do the two chromosomes in each pair come from? One from the mother One from the father
When a body cell divides, are the new cells identical to the original cell? Yes - the new cells are identical to the mother cell
When the new cells made are identical to the original, what is this type of cell division called? Mitosis
What do plants and animals use mitosis for? To grow and to replace cells that have been damaged
How is the DNA spread out in cells that are not dividing? In long strings
What form does DNA take when it is copied and duplicated? X-shaped chromosome - each are is an exact replicate of the other
Where do the chromosomes line up before they are divided? At the centre of the cell
What pulls the X-shaped chromosomes apart? Cell fibres
Where do the two arms of the X-shaped chromosome go when they are separated? To opposite sides of the cell
What forms around each of the sets of chromosomes? Membranes
What do the membranes become? The nuclei of the two new cells
What divides to create two new cells? The cytoplasm
What is asexual reproduction? A type of reproduction from which new organisms are made from a single organism
Does asexual reproduction use mitosis? Yes - some organisms, such as strawberry plants, form runners in this way which become new plants
Do the offspring in asexual reproduction by mitosis have the same genes have the original cell? Yes. There is no variation
CREDITS CGP GCSE Additional Science Exam Board: AQA Higher Level Revision Guide All questions are reworded - not direct from the book.
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