2023 WASSCE: Likely Biology Questions

On Friday, 1st September, 2023, the 2023 WASSCE Biology paper will be written. Here are some likely questions for all candidates

QUESTIONS

1.a Explain the following terms:

i. test cross;

ii. allele

iii. Albinism

iv. sex linkage

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.

c. Outline Lamarck’s theory of evolution.

2. a.i What is a gene?

ii. Differentiate between the terms genotype and phenotype.

b. Explain the following terms:

i. hybrid;

ii. pure breeding;

iii. Nucleotide.

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.

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3. (a) Explain the following terms:

(i) Test cross;
(ii) recessive allele;
(iii) homozygote.

(b) (i) Why is sickle-cell anaemia considered a deadly disease?

(ii) Explain briefly how sickle-cell anaemia can be reduced in a population

(iii) State one advantage which a carrier of the sickle-cell anaemia trait has.

4. (a) (i) What is competition?

(ii)In a tabular form, state four differences between competition and succession

(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.

(ii) What would be the outcome of mating a black heterozygote offspring from the F2 generation with the original black coloured parent?

WASSCE 2023: Food and Nutrition Projected Questions

5. (a) Explain the following terms;

i. test cross

ii. monohybrid cross

(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.

Written by Ghana Education News Editorial Staff

The Ghana Education News Editorial Staff is comprised of seasoned education consultants, policy analysts, and verified journalists dedicated to providing accurate, timely, and credible updates on the Ghanaian GES curriculum, WAEC updates, and academic leadership.