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3.4.U1 Mendel discovered the principles of inheritance with experiments in which large numbers of pea plants were crossed.
3.4.U2 Gametes are haploid so contain only one allele of each gene.
3.4.U3 The two alleles of each gene separate into different haploid daughter nuclei during meiosis.
3.4.U4 Fusion of gametes results in diploid zygotes with two alleles of each gene that may be the same allele or different alleles.
3.4.U5 Dominant alleles mask the effects of recessive alleles but co-dominant alleles have joint effects.
3.4.U6 Many genetic diseases in humans are due to recessive alleles of autosomal genes, although some genetic diseases are due to dominant or co-dominant alleles.
3.4.U7 Some genetic diseases are sex-linked. The pattern of inheritance is different with sex-linked genes due to their location on sex chromosomes. [Alleles carried on X chromosomes should be shown as superscript letters on an upper case X, such as Xh.]
3.4.U8 Many genetic diseases have been identified in humans but most are very rare.
3.4.U9 Radiation and mutagenic chemicals increase the mutation rate and can cause genetic diseases and cancer.
3.4.A1 Inheritance of ABO blood groups. [The expected notation for ABO blood group alleles: O = i, A=IA, B = IB.]
3.4.A2 Red-green colour blindness and hemophilia as examples of sex-linked inheritance.
3.4.A3I nheritance of cystic fibrosis and Huntington’s disease.
3.4.A4 Consequences of radiation after nuclear bombing of Hiroshima and accident at Chernobyl.
3.4.S1 Construction of Punnett grids for predicting the outcomes of monohybrid genetic crosses.
3.4.S2 Comparison of predicted and actual outcomes of genetic crosses using real data.
3.4.S3 Analysis of pedigree charts to deduce the pattern of inheritance of genetic diseases.
3.4.U2 Gametes are haploid so contain only one allele of each gene.
3.4.U3 The two alleles of each gene separate into different haploid daughter nuclei during meiosis.
3.4.U4 Fusion of gametes results in diploid zygotes with two alleles of each gene that may be the same allele or different alleles.
3.4.U5 Dominant alleles mask the effects of recessive alleles but co-dominant alleles have joint effects.
3.4.U6 Many genetic diseases in humans are due to recessive alleles of autosomal genes, although some genetic diseases are due to dominant or co-dominant alleles.
3.4.U7 Some genetic diseases are sex-linked. The pattern of inheritance is different with sex-linked genes due to their location on sex chromosomes. [Alleles carried on X chromosomes should be shown as superscript letters on an upper case X, such as Xh.]
3.4.U8 Many genetic diseases have been identified in humans but most are very rare.
3.4.U9 Radiation and mutagenic chemicals increase the mutation rate and can cause genetic diseases and cancer.
3.4.A1 Inheritance of ABO blood groups. [The expected notation for ABO blood group alleles: O = i, A=IA, B = IB.]
3.4.A2 Red-green colour blindness and hemophilia as examples of sex-linked inheritance.
3.4.A3I nheritance of cystic fibrosis and Huntington’s disease.
3.4.A4 Consequences of radiation after nuclear bombing of Hiroshima and accident at Chernobyl.
3.4.S1 Construction of Punnett grids for predicting the outcomes of monohybrid genetic crosses.
3.4.S2 Comparison of predicted and actual outcomes of genetic crosses using real data.
3.4.S3 Analysis of pedigree charts to deduce the pattern of inheritance of genetic diseases.
Bioknowledgy
Guided Notes
Alex lee
Pigeon genetics
Hairy Fingers
Genetic Practice
Pedigree Practice
Extra resources
Mendel and Mendelian Genetics
Mendelian Inheritance by Wiley
Children resemble their parents by DNA From The Beginning
Practice questions on Inheritance
Sex linked inheritance problems by the biology project
Monohybrid inheritance problems by the biology project
Drag and drop genetics by ZeroBio
Drag and drop pedigree charts by ZeroBio (n.b. tongue rolling is not a true example of monohybrid inheritance)
Mendelian Inheritance by Wiley
Children resemble their parents by DNA From The Beginning
Practice questions on Inheritance
Sex linked inheritance problems by the biology project
Monohybrid inheritance problems by the biology project
Drag and drop genetics by ZeroBio
Drag and drop pedigree charts by ZeroBio (n.b. tongue rolling is not a true example of monohybrid inheritance)
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