Genetics and Inheritance GCE Revision Questions Biology o level

Genetics and Inheritance GCE Revision Questions Biology

1. (a) What is a test cross?

(b) In the family, the gene for black hair is dominant and the gene for brown hair is recessive. The father is homozygous for black hair while the mother is heterozygous for black hair.

• With the aid of appropriate symbols and diagrams explain the genetics of the cross when the father and mother mate and produce offspring.
• If the offspring from the cross above mate with a double recessive individual, what would be the phenotype and genotype of the offspring?

2. (a) The sees resulting from cross between white flowered and red flowered parents produce a generation of pink flowered plants. Explain with the aid of appropriate symbols and diagrams, what would you expect the next generation of flowers to be if

• The pink flowered plants were allowed to self pollinate.
• The pink flowered plants were crossed with the white flowered plants.

3. (a) What is a gene?

(b) Giving two examples in each case, state the differences between haploid and diploid cells.

(c) The seed resulting from a cross between white and red flowered parents produced a generation of pink-flowered plants. Explain with the aid of appropriate symbols and diagrams what you would expect the next generation of flowers to be if:

• The pink-flowered plants were allowed to self pollinate.
• The pink flowered plants were crossed with the white flowered parent (all stages of your reasoning should be shown).

4. (a) Distinguish between:

• Inherited and non inherited variation.
• Haploid and diploid spores

(b) Black is dominant to white. A homozygous white mouse is crossed with a heterozygous black mouse.

• What are the genotypes of the offspring?
• What are the genotypes of the F2 generation if they are crossed with the heterozygous parent?

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Revision questions biology ordinary level for Students.

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Use of Biology revision questions. 

Above questions are revision questions for "Genetics and Inheritance" for ordinary level (o level). 

Candidates can use the above questions to prepare for the Cameroon General certificate of examination board GCE 

The questions are not only for Cameroonians preparing for the gce but they are revision questions for all students world wide preparing for the GCE or any other Examination.