WHERE DID YOU GET YOUR GENES?? LABEL THESE! VARIATION (D________ between us) I_____________ factors are caused by your GENES. E.g.__________________ E___________ factors are caused by your surroundings and how you live your life. E.g.__________________ You & Your Genes 1 D = dimples d = no dimples Which is dominant? _____________ How do you know? ______________ Does this person have dimples? ______ The genotype is _________ What is the genotype of someone with no dimples? ___________ The ‘no-dimple’ gene is r__________ D d Inheritance means ________ WHERE DID YOU GET YOUR GENES?? + From your ____ SEX CHROMOSOMES XX = _______ XY = _______ From your ____ Put a round the Dad Put a round a letter that represents an egg Fill in the chart There is a ____% chance the baby will be a girl. Which parent determines the baby’s sex? The fertilised egg will become an e_______, then a f_______, and eventually, a b______. YOU! X Y Fertilised egg Put the number of chromosomes in the boxes.

Gene therapy can be used to cure some ________ Gene therapy can be used to cure some ________. It is still in the early stages of development. GENETIC DISEASES are caused by f_______ genes. Examples: __________ ___________ Symptoms: thick, sticky _______ Affects: _______ & __________ systems 2. ________________ Disorder Symptoms: loss of co-ordination and memory Affects: __________ system HEALTHY GENE Make lots of ________ f F F F F Put into ______ of patient F F F Patient’s cells reproduce – with healthy gene! You & Your Genes 2 F F F F What is Embryo Selection? Some of the ‘left-over’ embryos are used to make STEM CELLS. What are stem cells? Why are they useful? Inheritance of CF There are two versions (a______) of the CF gene. The faulty one is RECESSIVE. A CF sufferer has FF/Ff/ff alleles (Circle the correct answer). F f