2.3 DNA and inheritance

Practice questions on DNA and inheritance

• In pea plants, the allele for tall stems (T) is dominant over the allele for dwarf stems (… (4 marks, Explain)
• Explain why offspring produced by sexual reproduction show variation, while offspring prod… (4 marks, Explain)
• In humans, the allele for freckles (A) is dominant over the allele for no freckles (a). Tw… (4 marks, Explain)
• In cats, the allele for short fur (F) is dominant over the allele for long fur (f). Two ca… (4 marks, Explain)
• A scientist extracts DNA from two different species of organism. They find that in species… (4 marks, Explain)
• Explain how a DNA molecule is able to copy itself accurately. (4 marks, Explain)
• Describe the structure of a DNA molecule. (4 marks, Describe)
• Explain why the sequence of bases in a DNA molecule is important for a living organism. (4 marks, Explain)
• Define the term 'gene' and explain how genes are organised within a cell. (4 marks, Define and Explain)
• A child inherits the allele for attached earlobes from both parents. The allele for attach… (4 marks, Explain)