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...
IB DP Biology: HL复习笔记3.2.2 Stages of Meiosis
DNA Replication before Meiosis Before meiosis occurs, all of the DNA inside the nucleus of the 'parent' cell is replicated This occurs during a period of the cell cycle known as interphase Once thi...
美国艺术类院校留学可以用A-Level申请吗？
美国艺术类院校留学可以用A-Level申请吗？同学们都知道A-level课程是英国的高中课程，那么用A-level课程申请美国的艺术院校需要什么样的申请要求呢？下面小编就列举下几所著名的美国艺术院校的A-level申请要求~ ...
IB DP Biology: HL复习笔记3.2.1 Meiosis
Meiosis There are two processes by which the nucleus of a eukaryotic cell can divide. These are: Mitosis Meiosis Mitosis gives rise to genetically identical cells and is the type of cell division u...
IB DP Biology: HL复习笔记3.1.10 Skills: Using Databases
Use of Databases to Identify Gene Loci Use of databases to identify the locus of a human gene and its polypeptide product Following the sequencing of the whole human genome, we now know the exact l...
IB DP Biology: HL复习笔记3.1.9 Karyograms
Karyograms During the stages of mitosis, chromosomes condense (become visible) This is most notable in metaphase Staining can reveal distinctive banding patterns on chromosomes at this stage The po...
IB DP Biology: HL复习笔记3.1.8 Sex Determination
Sex Determination Sex is determined by an entire chromosome pair (as opposed to most other characteristics that are just determined by one or a number of genes) Females have the sex chromosomes (pa...
IB DP Biology: HL复习笔记3.1.7 Chromosome Number
Haploid Haploid nuclei have one chromosome of each pair Haploid cells contain one complete set of chromosomes (n) In other words, they have half the number of chromosomes compared to normal body ce...
IB DP Biology: HL复习笔记3.1.6 Eukaryotic Chromosomes
Eukaryotic Chromosomes Chromosomes in eukaryotic cells are one, very long DNA molecule associated with proteins The main proteins present are the large, positively charged globular proteins called ...
