2023 WASSCE ‘LAST HOUR’ – Biology Theory Question 4 Legit Topic

2023 WASSCE will soon commence in five or six months’ time, although it seems far but not that far.
2023 aspiring candidates are urged to push hard in order to bring out their best and perform massively in the 2023 WASSCE.
We, at ghanaeducation.org, have studied and analysed a real pattern of questions that seems to drop each year at the same number over some years now.
Biology is studied by Science students and Home Economics students in every senior high school.
Biology topics require students to read more and wide to enable them to understand the concept very well.
2023 WASSCE is going to be a hard nut to crack and therefore candidates should be ready for it.
Do you know that over the past years Biology theory questions (Number 4) have been mainly about Genetics? Surprised right? Yes, question 4 is always about genetics.
FACTS:
2010 WASSCE Theory Question 4
4.a Explain the following terms:
i. test cross;
ii. allele
iii. Albinism
iv. sex linkage [8 marks].
b. A man with normal vision married a woman who is a carrier of colour blindness. With the aid of genetic diagrams determine the likely status of their offspring. [6 marks].
c. Outline Lamarck’s theory of evolution. [6 marks].
2011 WASSCE Theory Question 4
4.a.i What is a gene?
ii. Differentiate between the terms genotype and phenotype. [4 marks].
b. Explain the following terms:
i. hybrid;
ii. pure breeding;
iii. Nucleotide. [6 marks]
c. In garden pea seeds, smooth seed coat is dominant over rough seed coat. With the aid of a genetic diagram, determine the result expected if a homozygous rough pea is crossed with a smooth seed coat plant whose parent were rough coated. [10 marks].
2012 NOV/DEC Theory Question 3*
(a) Explain the following terms:
(i) Test cross;
(ii) recessive allele; [8 marks]
(iii) homozygote.
(b) (i) Why is sickle-cell anaemia considered a deadly disease? [5 marks]
(ii) Explain briefly how sickle-cell anaemia can be reduced in a population [6 marks]
(iii) State one advantage which a carrier of the sickle-cell anaemia trait has [1 mark]
2013 NOV/DEC Theory Question 4*
(a) (i) What is competition? [2 marks]
(ii)In a tabular form, state four differences between competition and succession [4 marks]
(b) A pure strain goat with black coloured fur was crossed with a pure strain goat with white coloured fur, all the offspring had black coloured fur.
(i) With the aid of a genetic diagram, determine the phenotypic ratio of the F2 generation if the F1 offspring are selfed. [10 marks]
(ii) What would be the outcome of mating a black heterozygote offspring from the F2 generation with the original black coloured parent? [4 marks]
2014 WASSCE Theory Question 4
A survey to determine blood groups was carried out on 250 people living a community.
The results are represented in the Table below.
Blood group |
Percentage |
A |
8.0 |
B |
14.0 |
AB |
32.8 |
O |
45.2 |
(a) (i) Explain the term co-dominance. [2 marks]
(ii) Calculate the number of individuals with co-dominant blood group. [3 marks]
(iii) What is the total number of individuals in the Table that are able
to donate blood to an accident victim with blood group B? [6 marks]
(b) A man whose blood group is heterozygous A is married to a woman whose
blood group is AB. With the aid of a genetic diagram, suggest the possible
blood groups of their children. [9 marks]
2015 WASSCE Theory Question 4
(a) Explain the following terms;
i. test cross
ii. monohybrid cross [4 marks]
(b) In a mango plant, the allele for bean-shaped seed is r and is recessive to round-shaped seed R. With the aid of a genetic diagram, determine the genotypes of the offspring if a homozygous bean shaped parent is crossed with a homozygous round shaped parent. [16 marks].
2016 WASSCE Theory Question 4
(a) Explain the term agglutination as used in blood transfusion. [3 marks].
ii. This part of the question was about blood transfusion between donor and recipients.
2017 WASSCE Theory Question 4
(a) A child belongs to blood group O and the mother belongs to group B. With the aid of a genetic cross, state the possible blood groups of the father. [16 marks].
2018 WASSCE Theory Question 4
(a) Explain briefly the following terms:
i. gene;
ii. hybrid;
iii. Trait. [6 marks].
(b) Two heterozygous yellow flowers are crossed. Using a genetic diagram, state the phenotypic and genotypic ratios of the first filial generation. [10 marks].
2019 WASSCE Theory Question 4
Use the information below to answer questions 4(a) (i) and (ii)
Hb A represent normal haemoglobin,
Hb S represent sickle haemoglobin.
(a) A female heterozygote for sickle cell married a sickle. With the aid of a genetic diagram, determine the:
(i) possible genotypes of their offspring; [8 marks]
(ii) phenotypic ratio of the offspring [ 2 marks]
(b) Explain briefly the reason why a Rhesus negative woman married to a Rhesus positive man might lose her second pregnancy. [5 marks].
(c) Name two examples of features in animals that support the theory of use and disuse of body parts as used by Lamarck. [2 marks].
(d) List 3 structures in mammals that are vestigial. [3 marks].
The same topic of question dropped in the year 2020, 2021 and 2022 as well.
So we urge all aspiring candidates to master GENETICS very well. It always drop on question 4 in WASSCE and Question 3 in NOV/DEC.
READ ALSO: WASSCE 2023: Key Things All Final Year Students Should Know