Will mark brainliest!
What are alleles?

1. The decoders of the DNA message
2. A measurable factor
3. The basic unit of inheritance
4. Two forms of single genes

Which of the following is not a characteristic of a hydrogen bond? 1. it is responsible for the unusual physical properties of water. 2. it is weaker than a covalent bond. 3. it is stronger than other dipole-dipole interactions. 4. it can occur when hydrogen is covalently bound to very electronegative elements liks f, cl, br and i.