Module 6
Biology
Patterns of inheritance practice
Monohybrid
1. Red petal colour, R, is dominant to white petal colour, r. Two parents, one with
red petals and one with white petals were bred together, and half of the offspring
had red petals and half had white petals. What are the possible genotypes of the
parents?
Multiple alleles
2. Brown eye colour, B, is dominant to blue eye colour, b, which is dominant to
green eye colour, g. Two parents, one with brown eyes and one with blue eyes have
a green eyed child. What are the genotypes of the parents?
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Module 6
Biology
Codominance
3. Purple flower petals, P, and red flower petals, R, are codominant and both
dominant to white flower petals, r. PR flowers produce pink petals. What genotypes
should the parent plants have if the gardener wants to produce 50% pink flowers
and 50% purple flowers?
Dihybrid
4. Guinea-pig hair colour and hair length are inherited together. Brown fur, B, is
dominant to white fur, b, and short fur, F, is dominant to long fur, f. Two parents with
genotypes, BbFf and bbFf breed together. What are the possible phenotypes and
genotypes of the offspring?
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