Question

Will medal & fan (:
The genomes of three species of mouse are being sequenced, and a particular DNA sequence found in all three species is found to have a steady mutation rate. The sequence of interest for these three species is shown below.

Species A: ATTCGGATTATTCGAGG

Species B: GTCCGGTTCATTGGACA

Species C: ATCCAGATCGTTCGTGG

Which of the following inferences can be made, based on this information?

Answer 1

a. Species B and Species C most likely diverged from Species A since they both have more mutations than Species A.
b. Species B most likely evolved from Species C since they are closest to each other in terms of number of mutations.
c. Species A and Species C most likely share the most recent common ancestor since they differ by the fewest mutations.
d. Species C most likely diverged from Species A more recently than Species B since Species C has fewer mutations than Species B.

Answer 2

what do u think ?

Answer 3

my guess would be c.

Answer 4

Two species having similarities in their DNA sequence are closely related !!

Answer 5

got it ?

Answer 6

yes . species a & b are closely related.

Answer 7

A & B or A & C ?

Answer 8

a & c im sorry. so is the answer d then ?

Answer 9

Bingo !!

Answer 10

thank you ! :)

Answer 11

Because a constant rate of mutation is going on, genomes are constantly mutating. So lesser difference will mean recent divergence. A and C have quite common sequences so C must have diverged from A recently than B

Answer 12

Though i find option C also correct !

Answer 13

So i'll urge you to cross check it with others

Answer 14

Species A: ATTCGGATTATTCGAGG
Species B: GTCCGGTTCATTGGACA
* *** * *** * (9 matches)

Species A: ATTCGGATTATTCGAGG
Species C: ATCCAGATCGTTCGTGG
** * *** **** ** (12 matches)

Species B: GTCCGGTTCATTGGACA
Species C: ATCCAGATCGTTCGTGG
*** * ** ** * (9 matches)

Answer 15

Since A and C have maximum matches so they must be closely related and hence will have a common ancestor !

Answer 16

got it ?