Phenotype, genotype and the environment Quiz
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5 questions, one answer each
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1. Which statement about phenotype is correct?
- A. It is determined by the genotype only
- B. It is determined by the environment only
- C. It is the result of an interaction between genotype and the environment
- D. It is the alleles that an individual has
2. What is the usual effect of methylating the promoter of a gene?
- A. Transcription increases
- B. The base sequence changes
- C. The mRNA is translated faster
- D. Transcription is reduced or stopped
3. Adding acetyl groups to histones leads to:
- A. looser DNA packing and more transcription
- B. tighter DNA packing and less transcription
- C. a change in the base sequence
- D. a mutation in the gene
4. Which is an example of continuous variation?
- A. Blood group
- B. Height
- C. Presence of a sickle cell allele
- D. Flower colour controlled by one gene with two alleles
5. Why can epigenetic changes in a tissue persist for a long time?
- A. They are passed to daughter cells at mitosis
- B. They are mutations in the DNA
- C. They are removed at every cell division
- D. They affect only the cytoplasm