« Back to subjects

HSC Biology

Sign up now   $99.00 / year

2 | Blueprint of life

3: Chromosomal structure provides the key to inheritance

Lesson 1 | Chromosomes

  • Outline the roles of Sutton and Boveri in identifying the importance of chromosomes

  • Describe the chemical nature of chromosomes and genes

  • Identify that DNA is a double stranded molecule twisted into a double helix with each strand comprised of a sugar-phosphate backbone and attached bases – adenine (A), Thymine (T), cytosine (C) and guanine (G) – connected to a complementary strand by pairing the bases, A-T and G-C

Lesson 2 | Meiosis and variation

  • Explain the relationship between the structure and behaviour of chromosomes during meiosis and the inheritance of genes

  • Explain the role of gamete formation and sexual reproduction in variability of offspring

  • Process information from secondary sources to construct a model that demonstrates meiosis and the processes of crossing over, segregation of chromosomes and the production of haploid gametes

Lesson 3 | Co-dominance and sex linkage

  • Describe the inheritance of sex-linked genes, and alleles that exhibit co-dominance and explain why these do not produce simple Mendelian ratios

  • Describe the work of Morgan that led to the understanding of sex linkage

  • Explain the relationship between homozygous and heterozygous genotypes and the resulting phenotypes in examples of co-dominance

Lesson 4 | Solve problems involving co-dominance and sex linkage

  • Solve problems involving co-dominance and sex linkage

Lesson 5 | Environment and phenotype

  • Outline ways in which the environment may affect the expression of a gene in an individual

Lesson 6 | Effect of environment on phenotype

  • Identify data sources and perform a first-hand investigation to demonstrate the effect of environment on phenotype

« Back to subjects
  • HSCStudy Lab Lessons

    59 Lessons

    Lessons by expert teachers that cover the NSW HSC Biology Syllabus comprehensively.

  • HSCStudy Lab Quizzes

    59 Practice questions

    59 lesson quizzes that include a variety of questions. This course also includes 15 focus level and 3 module level tests, as well as a comprehensive end of course practice exam.

  • HSCStudy Lab videos

    59 Hours of video

    Videos that fully explain complex biology questions through animation, practical experiments, and tutorials.

  • HSCStudy Lab interactives

    29 Interactive activities

    Interactive activities that help you explore and understand key syllabus dot point as well as additional resources.

Sign up for HSC Study Lab today!

Sign up now
HSC Students