I got this wrong on my exam and I don\'t think I\'m following the logic can anyo
ID: 145388 • Letter: I
Question
I got this wrong on my exam and I don't think I'm following the logic can anyone help me?
A Humsn Nebraska 82 Ehime BO CHR 83 New arsey 76 Wisconsn 61 Fort Monmauth 47 Mongoia 8 aAta 84 Tokyo 67 NWS 33 Cambridge 39 South Caroline 1918 Swine Nebraska 92 Wisconsin 90 Human New Jersey 76 Scotland 94 Ilnoa e3 Waconsin 61 Mongolia 9CHR 83 Morpalia 85 R 77 Suta 89 Kiey 79 Fort Manmouth 4 Airna Ata 84 lowa 30 Tokyo 6Twws South Caroina 1918 The trees above show the phylogeny estimated for the same mammalian Hl influenza (flu') based on portions of the haemaglutin genes. Tree A above was estimated from nucleotide bases 310-870 whereas Tree B was estimated from bases 1070-1650. Under the assumption that these trees are correctly rooted, how does this result support the inference that the S. Carolina 1918 strain (from the deadly 1918 flu pandemic) arose from recombination between a human and a swine virus? a. The fact that the S. Carolina 1918 strain is near the root of both trees suggests that it is of mixed identity b. The fact that the S. Carolina 1918 strain is more closely related to the swine strains in tree A and to the human strains in tree B The fact that the S. Carolina 1918 strain is a direct ancestor of all the swine strains in tree A but was isolated from a human. d the fact that the S. Carolina 1918 strain is more closely related to the lowa 30 strain than to the Scotland 94 human strain in both trees.Explanation / Answer
Answer should be option - a
The fact that the S. Carolina 1918 strain is near the root of both trees suggests that it is of mixed identity.
Explanation:
S.Carolina 1918 strain is near to the root in both the trees, which means it is closely related to the Ancestor of both Human Strains as well Swine Strain. Which means it has some ancestral Characters of both Human as well as Swine strain. The fact that it has ancestral characters of both Human and Swine strains as suggested by the Trees A & B, S. Carolina 1918 strain might be of mixed identity.
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