IB DP Biology: HL復(fù)習(xí)筆記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復(fù)習(xí)筆記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復(fù)習(xí)筆記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復(fù)習(xí)筆記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復(fù)習(xí)筆記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...
美國(guó)藝術(shù)類院校留學(xué)可以用A-Level申請(qǐng)嗎？
美國(guó)藝術(shù)類院校留學(xué)可以用A-Level申請(qǐng)嗎？同學(xué)們都知道A-level課程是英國(guó)的高中課程，那么用A-level課程申請(qǐng)美國(guó)的藝術(shù)院校需要什么樣的申請(qǐng)要求呢？下面小編就列舉下幾所著名的美國(guó)藝術(shù)院校的A-level申請(qǐng)要求~ ...
IB DP Biology: HL復(fù)習(xí)筆記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復(fù)習(xí)筆記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復(fù)習(xí)筆記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...
