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