Target: 10 questions in 10 minutes

1. A species of flowering plant can have either red or yellow flowers. The flower colour is controlled by one gene, where red is dominant to yellow. Two heterozygous plants were crossed, what would be the expected observed results in the F1 generation?

  Red Flowers Yellow Flowers
A. 60 140
B. 198 2
C. 146 54
D. 98 102
2. A man suffers from phenylketonuria (PKU), but his wife does not, however her father had the disease. What is the likelihood of their children suffering from the disease?
  • A.   100 %
  • B.   75 %
  • C.   50 %
  • D    0 %
3. What are all the possible phenotypes of children born to a father with blood group AB and a mother with blood group B?
  • A.   B only
  • B.   AB only
  • C.   AB, A and B
  • D.   AB and B
4. What is the pattern of inheritance in this pedigree?

Autosomal_Dominant_Pedigree_Chart

 GAThrawn22
c.c. BY-SA 3.0
  • A.   Sex linked recessive
  • B.   Sex linked dominant
  • C.   Chromosomal
  • D.   Autosomal dominant

5. A woman is a carrier of haemophilia; her husband does not have haemophilia. What are all the possible outcomes for their children?

  Daughters Sons
A. All normal All normal
B. Half carriers Half affected
C. All carriers All affected
D. Half affected Half affected
6. Which of the following applies to phenotypic plasticity?
  • A. Can be due to switching genes on and off
  • B. Are caused by changes to DNA sequence
  • C. Are irreversible
  • D. Are due to genotypic changes

7. The image shows an Indonesian stamp featuring the four o’clock flower, also known as the marvel of Peru (Mirabilis jalapa).

four oclock flower image

If differently coloured pure breeding homozygous parent plants of this species are crossed, and the resulting F1 generation then self-crossed, what would be the expected phenotypic ratio of the F2 generation?
  • A. 3:1
  • B. 1:1
  • C. 2:2
  • D. 1:2:1

8. What factor(s) contribute to the variation in human skin colour?

I. Skin colour exhibits discontinuous variation
II. Skin colour is influenced by multiple genes
III. Environmental factors can impact skin color
  • A. I only
  • B. II only
  • C. II and III only
  • D. I, II and III

Q9&10. The image shows a box and whisker diagram for the heights of a group of children:

box and whisker diagram for the heights of a group of children
9. What can be concluded from this box and whisker plot?
  • A. The mean height is 98cm
  • B. The mean = median
  • C. The median height is 98cm
  • D. There is negative skew
10. Which value would be considered an outlier?
  • A. 93.5 cm
  • B. 90.2 cm
  • C. 108.1 cm
  • D. 106.5 cm