A child has blood group O. The mother has blood group B. Four males have the genotypes shown.
Table
| Male | Genotype |
|---|---|
| W | IAIAI^AI^AIAIA |
| X | IAIBI^AI^BIAIB |
| Y | IBiI^BiIBi |
| Z | IBIBI^BI^BIBIB |
Which male could be the biological father, based only on these blood groups?
male W
male Y
male X
male Z
43 exam-style questions on Edexcel GCSE Biology 3.3 Inheritance, covering 3.3.1 Gregor Mendel and the basis of genetics, 3.3.2 Alleles and inherited characteristics, 3.3.3 Monohybrid inheritance, 3.3.4 Determination of sex at fertilisation, 3.3.5 Outcomes from monohybrid crosses, 3.3.6 Inheritance of ABO blood groups, 3.3.7 Inheritance of sex-linked disorders, and 3.3.8 Multiple genes and phenotypic features. Each one has a worked solution and a mark scheme showing where the marks go.