© Boardworks Ltd 2004 1 of 47 Biology Genetics. 2 of 47 © Boardworks Ltd 2004 What are little girls and boys made of? Sugar and spice and everything nice;

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Boardworks Ltd 2004 1 of 47 Biology Genetics Slide 2 2 of 47 Boardworks Ltd 2004 What are little girls and boys made of? Sugar and spice and everything nice; thats what little girls are made of. Slugs and snails and puppy dogs tails; thats what little boys are made of. What are little girls and boys really made of? Slide 3 3 of 47 Boardworks Ltd 2004 Inherited characteristics What makes this baby human? What determines its gender? In all living things, inheritable characteristics are passed on by genes that they inherit from their parents.. Where are genes found? Slide 4 4 of 47 Boardworks Ltd 2004 What are chromosomes? Slide 5 5 of 47 Boardworks Ltd 2004 What are chromosomes? Genes are found on chromosomes which are located in the nucleus of every cell. A gene Slide 6 6 of 47 Boardworks Ltd 2004 Human chromosomes Slide 7 7 of 47 Boardworks Ltd 2004 Human chromosomes You inherit half your chromosomes from your mother and half from your father. How many chromosomes do you inherit from each parent? How many pairs of chromosomes are there in human body cells? 23 pairs of chromosomes 23 unpaired chromosomes Slide 8 8 of 47 Boardworks Ltd 2004 What is DNA? Slide 9 9 of 47 Boardworks Ltd 2004 Chromosomes Chromosomes are made of long strands of DNA wrapped around protein Slide 10 10 of 47 Boardworks Ltd 2004 What is DNA? DNA stands for deoxyribonucleic acid. Slide 11 11 of 47 Boardworks Ltd 2004 Whats the order? Slide 12 12 of 47 Boardworks Ltd 2004 Can you explain what an inheritable characteristic is and give examples? Can you explain what a non inheritable characteristics and give examples? What controls our inheritable characteristics? Where are genes located? How many pairs of chromosomes are located in the nucleus of our cells? What are chromosomes made of?