these areas of DNA may affect how genes are expressed. Genetic 4.6.1.6 Give examples of 2 Discuss variation in families inheritance and characteristics controlled by a and why offspring have some 4.6.1.7 inherited single gene and describe their characteristics of their mother disorders. alleles. and some of their father and often strongly resemble their Some grandparents. characteristics are controlled by a single gene. Each gene may have 4.6.1.6 different forms 4.6.1.7 Complete Punnett squares Give examples of called alleles. Complete Punnett squares. and genetic crosses. characteristics controlled by The genes Interpret the results and multiple genes. BBC activity Inheritance present, or describe the offspring. showing genetic crosses (see Define and use the terms: genotype, operate resources). gametes, genotype, at a molecular phenotype, dominant level to develop recessive, homozygous and characteristics Show images of polydactyly. heterozygous. that are expressed Interpret family trees to as a phenotype. Complete a Punnett square to determine chance of inheriting show the outcomes of genetic disorders. A dominant allele crosses. is expressed if Watch a video to explain what Interpret the results of a cystic fibrosis is, how it is genetic cross diagram and use inherited and to illustrate the direct proportion and simple
these areas of DNA may affect how genes are expressed. 4.6.1.6 4.6.1.7 4.6.1.6 4.6.1.7 Genetic inheritance and inherited disorders. Some characteristics are controlled by a single gene. Each gene may have different forms called alleles. The genes present, or genotype, operate at a molecular level to develop characteristics that are expressed as a phenotype. A dominant allele is expressed if Give examples of characteristics controlled by a single gene and describe their alleles. Give examples of characteristics controlled by multiple genes. Define and use the terms: gametes, genotype, phenotype, dominant recessive, homozygous and heterozygous. Complete a Punnett square to show the outcomes of genetic crosses. Interpret the results of a genetic cross diagram and use direct proportion and simple 2 Discuss variation in families and why offspring have some characteristics of their mother and some of their father and often strongly resemble their grandparents. Complete Punnett squares. BBC activity Inheritance showing genetic crosses (see resources). Show images of polydactyly. Interpret family trees to determine chance of inheriting disorders. Watch a video to explain what cystic fibrosis is, how it is inherited and to illustrate the Complete Punnett squares and genetic crosses. Interpret the results and describe the offspring.
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