IB DP Biology: HL复习笔记10.3.4 Polyploidy & Speciation
Polyploidy & Speciation NOS: Looking for patterns, trends and discrepancies—patterns of chromosome number in some genera can be explained by speciation due to polyploidy When patterns and trend...
IB DP Biology: HL复习笔记10.3.3 Speciation
Gradualism & Speciation Speciation can be defined as the emergence of new and distinct species that are reproductively isolated from other separate species Two theories exist to explain the eme...
IB DP Biology: HL复习笔记10.3.2 Evolution
The Process of Evolution by Natural Selection Evolution requires that allele frequencies change with time in populations Evolution is defined as the cumulative change in the heritable characteristi...
IB DP Biology: HL复习笔记10.3.1 Gene Pools
Gene Pools A gene pool consists of all the genes and their different alleles, present in an interbreeding population Some populations of the same species are geographically isolated from each other...
IB DP Biology: HL复习笔记10.2.6 Variation
Types of Variation The ways in which organisms differ from one another is called variation Variation occurs between species In fact, species are classified based on differences between their respec...
IB DP Biology: HL复习笔记10.2.5 Skills: Chi-squared Test
Chi-squared Test and Dihybrid Crosses Use of a chi-squared test on data from dihybrid crosses The difference between expected and observed results in experiments can be statistically significant or...
IB DP Biology: HL复习笔记10.2.4 Skills: Identifying Recombinants
Identifying Recombinants in Crosses Genetic diagrams involving autosomal linkage often predict solely parental type offspring (offspring that have the same combination of characteristics as their p...
IB DP Biology: HL复习笔记10.2.3 Gene Linkage
Exceptions to Mendel's Rules NOS: Mendel used observations of the natural world to find and explain patterns and trends Since Mendel, scientists have looked for discrepancies and asked questions ba...
IB DP Biology: HL复习笔记10.2.2 Skills: Analysing Dihybrid Crosses
Predicting Phenotypic and Genotypic Ratios Worked Example Fruit flies (Drosophila melanogaster) were crossed in a laboratory study looking for inheritance patterns for two characteristics, wing len...
