Biology 0610 · IGCSE · Monohybrid inheritance

Monohybrid inheritance — practice question

Anthocyanin, a red pigment, is present in carnation flowers. Some carnation plants possess a gene that allows anthocyanin to be made.
(a(i))[3]

Describe the process growers use to selectively breed plants.

(a(ii))[2]

Explain the disadvantages of using sexual reproduction to breed red carnations.

(b)[2]

Define meiosis.

(c(i))[1]

State the genotype for a carnation plant that is heterozygous in this gene.

(c(ii))[1]

Describe the phenotype shown by a heterozygous carnation plant for this gene.

(c(iii))[4]

Predict, by means of a genetic diagram, the proportion of pure-breeding carnation plants among the offspring.

Worked solution & mark scheme

This 13-mark question has a full step-by-step worked solution and mark scheme. One marking point: Breed parent plants that possess the desired characteristics

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