This 67-slide Powerpoint presentation covers 'Topic 3.4 - Inheritance' in the 2016 IB Biology curriculum. Each slide includes the specific learning objective as well as key vocabulary that students should note. The topic has been divided into five sections:
A - Inheritance & Alleles
B - Monohybrid Crosses
C - Diseases & Sex-Linkage
D - Pedigrees
E - Genetic Mutations
The presentation itself contains minimal information as it is intended to be used with teacher guidance. They are also formatted to be visually pleasing and to print well for handouts or
revision. Please see the preview file for an idea of the slide aesthetic and level of detail. Slides with related YouTube videos have also been included, which might help familiarize
students with the topics.
As always, please let me know if you have any suggestions for improvements. These are always a work in progress!
U1: Mendel discovered the principles of inheritance with experiments in which large numbers of pea plants were crossed.
U2: Gametes are haploid so contain only one allele of each gene.
U3: The two alleles of each gene separate into different haploid daughter nuclei during meiosis.
U4: Fusion of gametes results in diploid zygotes with two alleles of each gene that may be the same allele or different alleles.
U5: Dominant alleles mask the effects of recessive alleles but co-dominant alleles have joint effects.
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.
U7: Some genetic diseases are sex-linked. The pattern of inheritance is different with sex-linked genes due to their location on sex chromosomes.
U8: Many genetic diseases have been identified in humans but most are very rare.
U9: Radiation and mutagenic chemicals increase the mutation rate and can cause genetic diseases and cancer.
A1: Inheritance of ABO blood groups.
A2: Red-green colour blindness and hemophilia as examples of sexlinked inheritance.
A3: Inheritance of cystic fibrosis and Huntington’s disease.
A4: Consequences of radiation after nuclear bombing of Hiroshima and accident at Chernobyl.
S1: Construction of Punnett grids for predicting the outcomes of monohybrid genetic crosses.
S2: Comparison of predicted and actual outcomes of genetic crosses using real data. **
S3: Analysis of pedigree charts to deduce the pattern of inheritance of
**This learning objective is omitted from the presentation at is better explained using full data sets and chi-squared practice problems.