Mutation is one cause of genetic variation in organisms.

Give two other causes of genetic variation.

1

2

Name the relationship between the two alleles that code for flower colour.

A dwarf, pink-flowered plant was crossed with a heterozygous tall, white-flowered plant.

Complete the genetic diagram to show all the possible genotypes and the ratio of phenotypes expected in the offspring of this cross.

Phenotypes of parents: Dwarf, pink-flowered × Tall, white-flowered

Genotypes of parents:

Genotypes of offspring:

Phenotypes of offspring:

Ratio of phenotypes:

A population of this species of plant contained 9% of red-flowered plants.

Use the Hardy–Weinberg equation to calculate the percentage of pink-flowered plants in this population.

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