Choose ALL of the CORRECT statements about the phylogeny shown below. Gene Monke
ID: 147941 • Letter: C
Question
Choose ALL of the CORRECT statements about the phylogeny shown below. Gene Monkey lysozyme Mouse lysozyme Elephant lysozyme Elephant lactalbumin Monkey lactalbumin Mouse lactalbumin A The lysozyme genes are paralogs of the lactalbumin genes B The elephant lysozyme and and elephant lactalbumin genes are most closely related in this tree. The gene duplication that gave rise to the lysozyme and lactalbumin genes happened prior to the origin of the placental mammals. D The lysozyme and lactalbumin phylogenies show different relationships among the three species of mammals E The tree shown here is a phylogram, indicating the number of nucleotide substitutions on the lineages.Explanation / Answer
Answer 1:
Option A is correct i.e; lysozyme genes are paralogs of the lactalbumin genes.
This is because they are related to a single original one and are the result of a gene duplication within a single genome.
Option B is incorrect.
In this phylogenetic tree, the elephant lysozyme gene is most closely related to the mouse lysozyme followed by the monkey lysozyme. The elephant lactalbumin gene is most closely related to the monkey lactalbumin gene followed by the mouse lactalbumin.
Option C is correct i.e, gene duplication that agve rise to the lactalbulmin and lysozyme genes happened prior to the origin of the placental mammals.
Option D is correct i.e; the lysozyme and lactalbumin phylogenies show different relationships among the three species of mammlas.
These are paralogous genes so they are related to a single ancestor but their functions maybe different. Thus, the function of both the genes in all the three species maybe different.
Option E is correct i.e; the tree shown here is a phylogram, indicating the number of nucleotide substitutions on the lineages.
Phylograms are evolutionary trees where the branches are of different lengths which represents the amount of evolutionary change and also the time for the total evolution. Thus the given tree is a phylogram which can indicate the number of nucleotide substitutions on the lineages.
Answer 2.
The R's at the right are examples of shared ancestral characters, whereas the K's on the right are examples of shared derived characters.
Related Questions
drjack9650@gmail.com
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.