Exam-style Questions

Revise quicker

reader

Join for FREE
(or Login)
  1. a) What do you call an individual with 2 alleles the same?

    b) What do you call an individual with 2 different alleles?

    (Marks available: 2)

    Answer

    Answer outline and marking scheme for question: 1

    a) Homozygous.

    b) Heterozygous.

    (Total = 2 marks)

  2. What does sickle cell anaemia do to red blood cells and why is this bad?

    (Marks available: 2)

    Answer

    Answer outline and marking scheme for question: 2

    The disease causes red blood cells to change from their usual round shape to become pointed.

    It is bad because it means they get stuck in blood vessels and cannot pick up oxygen properly from the lungs.

    (Total = 2 marks)

  3. Apart from sickle cell anaemia, name 3 other inherited diseases.

    (Marks available: 3)

    Answer

    Answer outline and marking scheme for question: 3

    Any 3 of the following:

    (i) cystic fibrosis;

    (ii) haemophilia;

    (iii) huntingtons chorea;

    (iv) downs syndrome.

    (Total = 3 marks)