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Cell division and inheritance

Genetic variation and genetic disorders - Test

1.

Genes can exist as different forms called:

2.

Polydactyly is caused by a:

3.

Cystic fibrosis is caused by:

4.

In a genetic diagram, how is a dominant allele shown?

5.

Which statement about human sex chromosomes is correct?

6.

Identical twins are very similar to each other mainly because:

7.

You need two copies of the faulty allele to have cystic fibrosis because:

8.

A gene is a section of: