Biology IGCSE: Variation and Selection

This is a Biology IGCSE covering Topic 18 Variation and Selection - Cambridge Assessment - Codes (0610) and (0970)

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Biology Cambridge IGCSE Course – Code 0610 and 0970: Topic 18 – Variation and Selection

Course Description:

Welcome to our Biology Cambridge IGCSE course, meticulously tailored to help you conquer the intricacies of Topic 18: Variation and Selection. This comprehensive course is specifically designed for both Code 0610 and Code 0970 syllabi, ensuring you’re well-prepared for the IGCSE Biology examination.

Course Highlights:

  • Comprehensive Core and Supplement Objectives: Master all core and supplement objectives as outlined in the syllabus for theory (papers 1, 2, 3, 4). These objectives provide a solid foundation for exam success.
  • Thoroughly Explained Experiments: Gain a deep understanding of practical experiments with detailed explanations. Notes summarize the method, results, interpretation, evaluation, reliability, and conclusion, enabling you to excel in paper 6 questions.

Course Outline & Objectives (Core and Supplement):

  1. Variation (Lesson 1): Key objectives include:
  • Describe variation as differences between individuals of the same species.
  • State that continuous variation results in a range of phenotypes between two extremes; examples include body length and body mass.
  • State that discontinuous variation results in a limited number of phenotypes with no intermediates; examples include ABO blood groups, seed shape in peas, and seed color in peas.
  • State that discontinuous variation is usually caused by genes only and continuous variation is caused by both genes and the environment.
  • Describe mutation as genetic change.
  • State that mutation is the way in which new alleles are formed.
  • State that ionizing radiation and some chemicals increase the rate of mutation.
  • Describe gene mutation as a random change in the base sequence of DNA.
  • State that mutation, meiosis, random mating, and random fertilization are sources of genetic variation in populations.
  1. Adaptive Features (Lesson 2): Key objectives include:
  • Describe an adaptive feature as an inherited feature that helps an organism to survive and reproduce in its environment.
  • Interpret images or other information about a species to describe its adaptive features.
  • Explain the adaptive features of hydrophytes and xerophytes to their environments.
  1. Selection (Lesson 3): Key objectives include:
  • Describe natural selection with reference to (a) genetic variation within populations (b) production of many offspring (c) struggle for survival, including competition for resources (d) a greater chance of reproduction by individuals that are better adapted to the environment than others (e) these individuals pass on their alleles to the next generation.
  • Describe selective breeding with reference to (a) selection by humans of individuals with desirable features (b) crossing these individuals to produce the next generation (c) selection of offspring showing the desirable features.
  • Outline how selective breeding by artificial selection is carried out over many generations to improve crop plants and domesticated animals and apply this to given contexts.
  • Describe adaptation as the process resulting from natural selection, by which populations become more suited to their environment over many generations.
  • Describe the development of strains of antibiotic-resistant bacteria as an example of natural selection.
  • Outline the differences between natural and artificial selection.
  1. Experiment – Collecting Data about Variation in a Group of People (Lesson 4): Key objectives include:
  • To collect data on the physical characteristics of a group of people and decide whether each characteristic shows discontinuous variation or continuous variation.

Course Benefits:

  • Engage with meticulously crafted video lessons, providing comprehensive explanations of each lesson and experiment.
  • Access downloadable summary study sheets that condense essential information, aiding your pursuit of an A* grade.
  • Enhance your preparation with quizzes and assignments based on past papers to boost your confidence for the exam.
  • Become part of a dynamic student group community, where you can interact with fellow learners and the course instructor, asking questions and sharing updates.

Unlock the captivating world of biology and prepare to excel in the IGCSE Biology examination through our “Biology Cambridge IGCSE Course – Code 0610 and 0970: “Variation and Selection” course.

You will need:

  • Computer or Mobile
  • Internet
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Lawra Hasayen Instructor
I'm the founder of Lawra Academy, with over two decades of teaching experience in Biology. I've had the privilege of instructing high school students preparing for exams such as IGCSE, A-levels, SAT, AP, IB, and SABIS, as well as offering tutoring to university students in various Business Administration subjects. During my extensive career, I spent more than 13 successful years at King Saud International School. My students consistently achieved outstanding results, often earning A* grades. Additionally, I served as the head of the biology department. Eventually, I decided to embark on my entrepreneurial journey, leading to the establishment of Lawra Academy.