Nuclear division

16.1

What the syllabus asks of you

Understand that chromosomes contain DNA, which carries genetic information in the form of genes
Describe a haploid nucleus as a nucleus containing a single set of chromosomes
Describe a diploid nucleus as a nucleus containing two sets of chromosomes
State that in a diploid cell there is a pair of each type of chromosome and in a human diploid cell there are 23 pairs
Describe mitosis as nuclear division giving rise to genetically identical cells in which the chromosome number is maintained (details of stages are not required)
Outline the role of mitosis in growth, repair of damaged tissues, replacement of dying cells and asexual reproduction
Describe stem cells as unspecialised cells that divide by mitosis to produce daughter cells that can become specialised for specific functions
State that meiosis is involved in the production of gametes
Describe meiosis as a reduction division in which the chromosome number is halved from diploid to haploid resulting in genetically different cells (details of stages are not required)
Understand that cancers form as a result of uncontrolled cell division

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Chapter 16: Nuclear division

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