Genetics with Drosophila – Post Lesson Practice

Copy and complete the following sentences.

1. Drosophila is a suitable insect for ____________ experiments as

it has a __________ life cycle and produces ___________

numbers of offspring. (3)

2. In a ___________ cross, the parents chosen differ for just one

characteristic. To ensure that they do not carry any hidden

______________ alleles, it is important that _____________

parents are used. (3)

3. The parents are bred together to produce the _______

generation which are then self crossed to produce the _________

generation. (2)

4. Counting the number of each phenotype produced allows the

phenotype _________ to be calculated. To increase the __________

of this result, the experimental cross should be repeated. (2)

Total = 10