Paper 3 structured question: Monohybrid inheritance
Paper 3Theory (Core)3 marks
Diagram Description
Pedigree Chart
Generation 1: Two unshaded parents (one male, one female). Generation 2: Four children: one shaded male, one unshaded female, one unshaded male, one unshaded female. Generation 3: The shaded male from generation 2 marries an unshaded female. They have two children: both unshaded (one male, one female).
| Generation | Individual | Sex | Trait |
|---|---|---|---|
| 1 | Parents | Male | No trait |
| 1 | Parents | Female | No trait |
| 2 | Child 1 | Male | Has trait |
| 2 | Child 2 | Female | No trait |
| 2 | Child 3 | Male | No trait |
| 2 | Child 4 | Female | No trait |
| 3 | Child 1 | Male | No trait |
| 3 | Child 2 | Female | No trait |
- a[1]
Identify What type of inheritance pattern does this pedigree chart show?
- b[2]
State Why can two parents without the trait have a child with the trait?