Edexcel IGCSE Biology 复习笔记 3.2.6 Variation
Edexcel IGCSE Biology 复习笔记 3.2.6 Variation Types of Variation Variation is defined as differences between individuals of the same species Variation can be divided into two types dependin...
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Edexcel IGCSE Biology 复习笔记 3.2.5 Cell Division
Edexcel IGCSE Biology 复习笔记 3.2.5 Cell Division Mitosis Mitosis is defined as nuclear division giving rise to genetically identical cells This type of cell division is used for growth, re...
Edexcel IGCSE Biology 复习笔记 3.2.4 Predicting Genetic Inheritance
Edexcel IGCSE Biology 复习笔记 3.2.4 Predicting Genetic Inheritance Family Pedigrees Family pedigree diagrams are usually used to trace the pattern of inheritance of a specific characteristi...
Edexcel IGCSE Biology 复习笔记 3.2.3 Genetic Inheritance
Edexcel IGCSE Biology 复习笔记 3.2.3 Genetic Inheritance Key Definitions A gene is a short length of DNA found on a chromosome that codes for a particular characteristic (expressed by the fo...
Edexcel IGCSE Biology 复习笔记 3.2.2 Protein Synthesis
Edexcel IGCSE Biology 复习笔记 3.2.2 Protein Synthesis RNA Like DNA, the nucleic acid RNA (ribonucleic acid) is a polynucleotide – it is made up of many nucleotides linked together in a long...
Edexcel IGCSE Biology 复习笔记 3.2.1 DNA & the Genome
Edexcel IGCSE Biology 复习笔记 3.2.1 DNA & the Genome The Genome The entire set of the genetic material of an organism is known as its genome In 2003, scientists completed a 13-year proj...
Edexcel IGCSE Biology 复习笔记 3.1.7 Human Sex Hormones
Edexcel IGCSE Biology 复习笔记 3.1.7 Human Sex Hormones Secondary Sexual Characteristics Primary sexual characteristics are present during development in the uterus and are the differences i...
Edexcel IGCSE Biology 复习笔记 3.1.6 Pregnancy
Edexcel IGCSE Biology 复习笔记 3.1.6 Pregnancy Implantation & Development of the Foetus After fertilisation in the oviduct, the zygote travels towards the uterus This usually takes about...
Edexcel IGCSE Biology 复习笔记 3.1.5 Sexual Reproduction in Humans
Edexcel IGCSE Biology 复习笔记 3.1.5 Sexual Reproduction in Humans The Male Reproductive System The male reproductive system Male Reproductive Structures & th...
