IB DP Biology: HL复习笔记3.4.1 Electrophoresis & PCR
Gel Electrophoresis Gel electrophoresis is used to separate proteins or fragments of DNA according to size Gel electrophoresis is a technique used widely in the analysis of DNA, RNA, and proteins D...
IB DP Biology: HL复习笔记3.3.5 Mutations & Disease
Causes of Mutations A mutation is a change in the sequence of base pairs in a DNA molecule They occur randomly and continuously to create new alleles of a gene Often only with a very small number o...
IB DP Biology: HL复习笔记3.3.4 Inheritance of Genetic Diseases
Causes of Genetic Disease A gene can affect a phenotype of an organism A gene codes for a single polypeptide The polypeptide affects the phenotype through a particular mechanism The phenotype of an...
IB DP Biology: HL复习笔记3.3.3 Skills: Inheritance
Constructing Punnett Grids A monohybrid trait is one that is controlled by only one gene Generally, we consider that such a gene has two alleles Either: one allele is dominant and the other is rece...
剑桥土地经济专业是什么专业？
作为世界顶尖学府之一的剑桥大学却具有一个十分特殊且与经济相关的专业——土地经济。剑桥土地经济专业是什么专业？剑桥大学的土地经济是不少同学的梦想专业，但毕竟土经每年只招60多个人。 剑桥·土地经济 Land Eco...
IB DP Biology: HL复习笔记3.3.2 Inheriting Alleles
Segregation of Alleles Meiosis is a form of nuclear division that results in the production of haploid cells from diploid cells During meiosis a diploid cell will divide twice to form four haploid ...
IB DP Biology: HL复习笔记3.3.1 Inheritance
Mendel's Experiments Gregor Mendel was an Austrian monk He was trained in mathematics and natural history at the University of Vienna In the mid-19th century, Mendel carried out breeding experiment...
IB DP Biology: HL复习笔记3.2.5 Skills: Meiosis
Drawing the Stages of Meiosis Cells undergoing meiosis can be observed and photographed using specialized microscopes The different stages of meiosis have distinctive characteristics meaning they c...
IB DP Biology: HL复习笔记3.2.4 Non-disjunction
Non-disjunction Non-disjunction occurs when chromosomes fail to separate correctly during meiosis This can occur in either anaphase I or anaphase II, leading to gametes forming with an abnormal num...
IB DP Biology: HL复习笔记3.2.3 Genetic Variation
Genetic Variation & Meiosis Crossing over and random orientation promote genetic variation Having genetically different offspring can be advantageous for natural selection and therefore increas...
美国院校更新托福成绩要求，多所院校提高了对申请者的托福最低要求！
在最新美国院校托福成绩要求中，有部分院校提高了对申请者的托福最低要求。 加州大学伯克利分校和威斯康星大学麦迪逊分校都由无最低托福成绩要求变更为托福成绩不低于80分。另外从哥伦比亚大学官网获悉：2023申请...
北京口碑较好的国际学校盘点！
随着国际教育的不断发展，越来越多孩子不想上公立学校，纷纷都将目光转向了国际学校。但是想上好的国际学校，难度可比想象中的更大。口碑好的国际学校在考试入学的时候，有的学生录取比例就在20:1以上，竞争非常...
