HKDSE (Hong Kong) · Biology
Genetics and Evolution
9 practice questions, each with the answer and an explanation.
Practise Genetics and Evolution now
Random questions from this topic, one at a time. You see the answer and the explanation straight after each one.
All 9 questions
- How many chromosomes are in a normal human body cell?
- Which base pairs with adenine in DNA?
- In pea plants, tall (T) is dominant to dwarf (t). What proportion of the offspring of a cross Tt x Tt is expected to be dwarf?
- A woman who is a carrier of red-green colour blindness (X-linked recessive) has children with a man of normal vision. What is the chance that a son is colour blind?
- Which type of cell division produces gametes?
- Which of these is a source of variation in sexual reproduction?
- Which structure carries the genetic code from DNA in the nucleus to the ribosome?
- Which change is a gene mutation?
- According to natural selection, why do more individuals with a useful variation survive and reproduce?