In recent years, DNA sequences (nucleotide sequence) of mtDNA and Y chromosomes were considered for the study of human evolution, because
| 1. | they are small, and therefore, easy to study |
| 2. | they are uniparental in origin and do not take part in recombination |
| 3. | their structure is known in greater detail. |
| 4. | they can be studied from the samples of fossil remains. |