Topic 6-Inheritance, Variation and Evolution

• what is the linnaean classification system?


  Linnaeus classified living things into kingdom, phylum, class, order, family, genus and species
• Give two advantages of embryo screening

  1)it can reduce suffering by stopping children from being born with genetic disorders

  2) It can save the country a lot of money as treatment for inherited disorders is very expensive
• What is gene therapy?


  Gene therapy is the treatment of an inherited disorder by giving the patient a healthy copy of the faulty gene
• What are the benefits of knowing the human genome sequence?

  It aids in understating genetic diseases, early detection and development of personalised medicine
• What does the phrase ‘survival of the fittest‘ mean?

  The individuals with the most favourable characteristics are most likely to survive
• What is natural selection?

  Natural selection is the process by which certain traits become more or less common in a population over time based on their ability to survive and reproduce.
• Give three advantages of using a binomial system to name species

  1)It means each species has a unique name which avoids confusion

  2)it allows scientist from different parts of the world to discuss species (many local names are different)

  3)It can show how closely related organisms are (as closely related organisms ofter have the same genus name).
• Are the cells produced by meiosis genetically identical or unique?

  Genetically unique- this means that all the calls are genetically different from each other
• What does it mean to be ‘heterozygous‘ for a particular gene?

  The two alleles of that gene are different
• Why are regulations important in genetic screening?

  To prevent gene-based bias and ensure fair treatment in society
• Suggest 5 conditions that are required to ensure healthy growth of the small plants during micropropagation

  1)Aseptic conditions

  2)Warm temperatures

  3)Sufficient light

  4)Right humidity

  5)Growth hormones
• Is polydactyly a dominant or recessive condition?

  Polydactyly is a dominant condition
• What is sexual reproduction?

  Sexual reproduction is a type of reproduction that involves the fusion of gametes from two parents, resulting in offspring with a combination of genetic traits from both parents.
• Are most characteristics determined by: a single gene, a combination of multiple genes, or the combination of multiple genes and the environment?

  Most characteristics are determined by the combination of multiple genes and the environment