Genes

Question 1

What kind of genetic disorders are usually caused by recessive alleles?

Answer 1

Monogenic disorders (caused by a single gene mutation)

Question 2

State the order of DNA replication

Answer 2

1. Helicase unzips and unwinds the DNA strands
2. The replication fork forms
3. Single strand binding proteins keep the DNA from binding together again
4. DNA primase adds RNA primers to the template strands
5. DNA polymerase III binds at the primers and begins to synthesise the new strands
6. DNA polymerase I removes RNA primers and replaces them with DNA nucleotides
7. DNA ligase connects Okazaki fragments