Matching exercise

Match the items on the right to the items on the left.
1 We _____________ some features from our parents
2 Other features are the effect of our ___________
3 Give an example of inherited variation that is clear-cut.
4 What sort of things vary gradually?
5 What are the thread-like structures found in the nucleus?
6 How many of these thread-like structures are there in most human cells?
7 What is it that controls features like our eye colour?
8 What chemical makes up the genes?
9 How many genes are there for each feature that is inherited?
10 If a brown gene is 'stronger' than a white gene, we say that it is ________ .
11 Genes giving a 'weaker' message are called _________ .
12 What is meant by selective breeding?
13 How have new breeds of cattle 'improved' upon older breeds?
14 What is artificial insemination?
15 Eggs from the best cows can be fertilised with bull sperm in a test-tube. The fertilised eggs are put into another cow. What are these called?