School Exam ^🔗

• When: Wednesday August 12th, 12.30pm
• Where: D5
• What: Genetics (AS90948, External, 4 Level 1 Credits)
• Time: 1.5 hours

What Do I Need To Know? ^🔗

1. DNA! ^🔗

• Structure: A pairs T and G pairs with C
  • Notes on sciPAD page 13

For the image below, complete the pairs & name the pentagon and circle shaped structures

• Be able to describe the relationship/differences/similarities between chromosomes, DNA, genes and alleles
  • Notes on sciPAD page 7
  • Notes on genes vs alleles on sciPAD page 14

Using this image, describe in words the relative size/location/structure of chromosomes, DNA, genes and alleles

2. Sexual and Asexual Reproduction ^🔗

• What types of cell division occurs in sexual reproduction/asexual reproduction
  • sciPAD page 12 for mitosis (asexual)
  • sciPAD pages 53-56 for meiosis, sexual and asexual reproduction
• What are the advantages/disadvantages of these types of reproduction
  • ^ Link to variation

Complete the questions on pages 53-56 of the sciPAD

3. Fertilisation ^🔗

• Diploid & haploid cells
• Number of chromosomes at different steps of fertilisation
• Type of cell division at different steps of fertilisation/reproduction
  • Notes on sciPAD page 57

Complete the questions on page 57 of the sciPAD

• Define: phenotype and genotype
  • Notes on sciPAD page 23
• Create a punnet square

Complete questions on pages 24-27 of the sciPAD

• What do punnet squares mean vs. the real world
• Predict/explain outcomes of punnet squares

Complete questions on page 28 of the sciPAD

4. Pedigree Charts ^🔗

• Reading pedigree charts (circles vs. squares, coloured in vs. white)
  • Notes on sciPAD page 36
• Predicting the genotype for individuals on a pedigree chart
• Explain whether a trait is dominant or recessive using a pedigree chart

Complete questions on page 36-39 of the sciPAD

• Use a punnet square to give an example showing a trait is dominant/recessive
• Use punnet squares to predict the probability of certain genotypes/phenotypes between pairs on a pedigree chart
  • Notes on sciPAD page 40

Complete questions on page 40 of the sciPAD