Populations & their Allele Frequencies Comparison of allele frequencies of geographically isolated populations Allele frequency is a term that assigns a relative frequency of an allele at a par...
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...
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...
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...
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...
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...
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...
esl课程与雅思对比，一起来看看。ESL（English as a second language），该门考试的作用和我们更常听说的雅思（IELTS）、托福（TOFEL）考试类似，都是为非英语为母语的学生向学校提供一项英语语言能力的证明，用...
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...
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...
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...
对于留学生来说，除了学校和专业之外，未来就业的情况也是择校的重要依据之一。从长远来看，选择一所好学校，不仅是看学校的学术实力，也要看学校能否给与你在毕业后相应的就业支持。此前QS发布了2022QS全球毕业...
