IB DP Biology: HL复习笔记10.2.1 Unlinked Genes
Independent Assortment & Segregation Unlinked genes segregate independently as a result of meiosis Unlinked genes are genes that an organism carries on separate chromosomes Not on homologous co...
IB DP Biology: HL复习笔记10.1.5 Skills: Drawing Chiasmata
Drawing Chiasmata Skill: Drawing diagrams to show chiasmata formed by crossing over Drawing tips Use two coloured pens/pencils to show chromosomes/chromatids of maternal or paternal origin One chro...
IB DP Biology: HL复习笔记10.1.4 Meiosis II
Meiosis II Second division of Meiosis : Meiosis II There is no interphase between meiosis I and meiosis II so the DNA is not replicated The second division of meiosis is almost identical to the sta...
IB DP Biology: HL复习笔记10.1.3 Meiosis I
Meiosis I Homologous chromosomes separate in meiosis I Prophase I DNA has already replicated and condenses and becomes visible as chromosomes Each chromosome consists of two sister chromatids joine...
IB DP Biology: HL复习笔记10.1.2 Crossing Over
Crossing Over Crossing over is the exchange of DNA material between non-sister homologous chromatids Meiosis has several mechanisms that increase the genetic diversity of gametes produced Both cros...
IB DP Biology: HL复习笔记10.1.1 The Process of Meiosis
Replication of Chromosomes Like mitosis, meiosis is preceded by DNA replication Like most other eukaryotic cells, gamete-producing cells perform a cell cycle Gamete-producing cells are found in the...
IB DP Biology: HL复习笔记9.4.4 Skills: Investigating Factors Affecting Germination
Experiments Investigating Factors Affecting Germination Seeds remain dormant long enough to allow seed dispersal or until conditions are favourable During dormancy the seed is unable to germinate a...
IB DP Biology: HL复习笔记9.4.3 Skills: Drawing Plant Structures
Drawing the Internal Structure of Seeds A seed consists of several parts which can be shown in a labelled diagram Testa The seed coat Cotyledon or cotyledons The leaf or leaves of the embryo which ...
IB DP Biology: HL复习笔记9.4.2 Plant Reproduction
Mutualism Between Flowers & Pollinators Sexual reproduction in plants requires the transfer of pollen between flowers Methods of pollen transfer can include: Wind Animals Water Most flowering p...
