Sentences with phrase «early breed lineage»

Not exact matches

Overall, the study's data from mitochondrial DNA — different from nuclear DNA in that it helps scientists trace maternal lineages — reveal that population structure in humpback whales is largely driven by female whales that return annually to the same breeding grounds and by the early experience of calves that accompany their mothers on their first round - trip migration to the feeding grounds.

Despite their ancient lineage, Shar - Peis became well - known in the United States only in the early 1970s, when they were touted as a rare breed and a focused campaign to appeal to fanciers began.