Edexcel GCSE Biology (1BI0) · EDEXCEL 1BI0
3 Genetics
Written & reviewed by James Millett — Biology (Imperial College London), PGCE Science (University of Cambridge).
Practice questions on Genetics
- Explain why not all mutations lead to a change in an organism's phenotype. (4 marks, Explain)
- Explain how mutations in an organism's DNA can lead to variation in a population of the sa… (4 marks, Explain)
- Describe the causes and types of outcome of mutations, and explain how mutations contribut… (4 marks, Describe)
- Explain how a mutation in a gene can lead to a change in an organism's phenotype. (4 marks, Explain)
- A cat breeder is studying eye colour in Siamese cats. Blue eye colour is controlled by a d… (4 marks, Explain)
- Explain why meiosis is important for producing genetic variation in a species. (4 marks, Explain)
- Explain why sexual reproduction leads to greater genetic variation in offspring compared w… (4 marks, Explain)
- Explain why the daughter cells produced by meiosis are described as haploid and why this i… (4 marks, Explain)
- Strawberry plants can reproduce both sexually and asexually. Explain why a strawberry plan… (4 marks, Explain)
- Describe how meiosis and fertilisation together ensure that offspring produced by sexual r… (4 marks, Describe)
- A coral reef contains coral organisms that can reproduce both sexually and asexually. Duri… (4 marks, Explain)
- A farmer grows a crop of banana plants. All the banana plants are produced by asexual repr… (4 marks, Explain)
- Describe what happens during meiosis to produce gametes from a diploid cell. (4 marks, Describe)
- A diploid cell in a human testis undergoes meiosis. Explain why the four daughter cells pr… (4 marks, Explain)
- A student states: 'Meiosis must involve two divisions because a single division is not eno… (4 marks, Explain)
- Describe the structure of a DNA molecule. (4 marks, Describe)
- Explain why DNA is described as a polymer and outline the role of complementary base pairi… (4 marks, Explain)
- Explain how the structure of a DNA nucleotide allows DNA to store genetic information and … (4 marks, Explain)
- A couple are both heterozygous for the allele that causes cystic fibrosis. The allele for … (4 marks, Explain)
- Explain how complementary base pairing contributes to the stability of a DNA molecule and … (4 marks, Explain)