Biology 5090 · O Level · Inheritance

Inheritance — practice question

In fruit flies, the allele for an ebony-coloured body is recessive to the allele for a grey-coloured body. In an investigation, a fly with an ebony body is crossed with a fly with a grey body. What will be the body colour of the offspring if the grey-bodied fly is heterozygous?

  • Aall ebony
  • Ball grey
  • Chalf ebony and half grey
  • Dthree-quarters grey and one-quarter ebony

Worked solution & mark scheme

This 1-mark question has a full step-by-step worked solution and mark scheme.

  • Full mark scheme, point by point
  • Step-by-step worked solution
  • Write your answer & get it marked instantly by AI