Practice IB Biology Topic 3.4 Inheritance with authentic exam-style questions for both SL and HL students. This question bank focuses on the exact syllabus content for 3.4 Inheritance and mirrors Paper 1A, 1B, 2 style where relevant.
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Which of the following is an inherited disease that is due to a base substitution mutation in a gene?
In Manx cats, allele causes the tail-less phenotype and allele causes a normal tail. Genotype is lethal, so only surviving offspring are counted.
A breeder performed several crosses between two tail-less Manx cats. The phenotypes of the surviving offspring were recorded and are summarized in the table below.
| Phenotype | Number of individuals |
|---|---|
| Tail-less | 82 |
| Normal tail | 41 |
Based on the data provided, what is the most likely genotype of each parent cat?
Which of the following involves complementary base pairing?
I. Transcription II. Translation III. Replication IV. Denaturation
The blood groups of a mother and four children are indicated on the pedigree chart below.
What are the possible blood groups of the father?
If 15% of a sample of DNA is thymine, what percentage of the DNA is guanine?