Inheritance of characters

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	Time: 4 hours Level: Introductory

	Introduction Introduction Resource Genes are units of inheritance that contribute to a person’s behaviour and health. In this unit you will learn what genes, DNA and chromosomes are and how they combine to make the human genome. You will...

	Human genetics and health issues: an overview 1 Inheritance of characters Resource Imagine you have found some old family photograph albums which span many generations. What are the distinctive family features, or characters, that demonstrate the relatedness of individuals? In other... 2 The human genome: chromosomes and genes Resource Almost all of the different types of cell in an individual contain the same genetic material in the chromosomes, as a consequence of mitosis. You had a glimpse of the appearance of the 46 human chromosomes... 3 The transmission of genetic material Resource The full complement of 46 chromosomes in the human genome, the diploid number, is restored at fertilization. As Figure 3.1 shows, all the somatic cells and cells in the testes and ovaries arise from the... 4 Fertilization Resource Now that we have considered the production of gamete cells, including the process of meiosis, we can examine the next stage of reproduction, the process of fertilization, which occurs inside the female's...

	References and Acknowledgements Acknowledgements Resource