Top Posters
Since Sunday
25
12
10
9
l
4
4
w
3
M
3
3
M
3
C
2
2
New Topic  
kryocron kryocron
wrote...
Posts: 3
Rep: 0 0
4 years ago
** I tried to use photobucket to upload the pictures beside the questions however it didn't work. I instead had to attach them to this post

1. What are the most likely characteristics of the most recent common ancestor (MRCA) of fly species 1 and fly species 2, labeled in the diagram above?


Lots of leg bristles; can't tell on the other two traits

Lots of leg bristles, striped wings; can't tell on eye color

Lots of leg bristles, striped wings, red eyes

Lots of leg bristles, striped wings, white eyes




Q5. Humans carry a variety of non-functional genetic sequences, called processed pseudogenes, in their DNA. We can estimate how long ago these sequences first appeared in the genomes of our ancestors. In humans, processed pseudogenes include the three options below. Which of these would be least widespread among other primate species?


alpha-enolase psi1 (11 million years old)

AS psi7 (16 million years old)

CALM II psi3 (36 million years old)






My answer: A and D Slight Smile




Q7. Rhesus monkeys and gorillas have stereoscopic vision, which allows them to better visually gauge distances while hunting and moving through tree canopies. If stereoscopic vision evolved only once on this tree, and was never subsequently lost, which other primate species on the evolutionary tree possess stereoscopic vision as well? (Hint: First, find the location on the tree of the most recent common ancestor of rhesus monkeys and gorillas.)


Human

Gibbon and orangutan

Gibbon, orangutan, and human

Gibbon, orangutan, common chimpanzee, bonobo, and human
Q8. Which of the following traits (as labeled on the diagram) is shared by both orangutans and gibbons?


Trait R

Trait S

Trait P

Trait Q

Q9. Rhesus monkeys are the last common ancestor of gibbons, gorillas, and humans.

True

False

Q10. Gibbons are more closely related to humans than to rhesus monkeys.

True

False
Attached file(s)
Thumbnail(s):
You must login or register to gain access to these attachments.
Read 13278 times
53 Replies
Replies
Answer verified by a subject expert
bio_manbio_man
wrote...
Educator
Top Poster
Posts: 30197
4 years ago Edited: A month ago, bio_man
Sign in or Sign up in seconds to unlock everything for free
1. What are the most likely characteristics of the most recent common ancestor (MRCA) of fly species 1 and fly species 2, labeled in the diagram above?

Lots of leg bristles; can't tell on the other two traits

Lots of leg bristles, striped wings; can't tell on eye color

Lots of leg bristles, striped wings, red eyes

Lots of leg bristles, striped wings, white eyes

*See attachment for my answer*

Q5. Humans carry a variety of non-functional genetic sequences, called processed pseudogenes, in their DNA. We can estimate how long ago these sequences first appeared in the genomes of our ancestors. In humans, processed pseudogenes include the three options below. Which of these would be least widespread among other primate species?

alpha-enolase psi1 (11 million years old)

AS psi7 (16 million years old)

CALM II psi3 (36 million years old)

My answer: A and D

Most likely the oldest one, in this case CALM (option 3).

The primates didn't all split off at the same time from our common ancestor. Some split of earlier than others, so if you go for the oldest option it's the most likely that even primate species that split of from the common ancestor the earliest still have the gene.

Q7. Rhesus monkeys and gorillas have stereoscopic vision, which allows them to better visually gauge distances while hunting and moving through tree canopies. If stereoscopic vision evolved only once on this tree, and was never subsequently lost, which other primate species on the evolutionary tree possess stereoscopic vision as well? (Hint: First, find the location on the tree of the most recent common ancestor of rhesus monkeys and gorillas.)

Human

Gibbon and orangutan

Gibbon, orangutan, and human

Gibbon, orangutan, common chimpanzee, bonobo, and human

Gibbon, orangutan, common chimpanzee, bonobo and human.

The most recent common ancestor of Rhesus monkey and Gorillas would be at the base of the tree, and is the first point where split occurs in the tree. Its one lineage gave rise to Rhesus monkey and the other lineage gave rise to all other species shown in the pedigree. Except Rhesus monkey, all other species of the tree will have trait Q.

Thus, the stereoscopic vision, present in Rhesus monkey and gorilla, will also be found in the other 5 taxa. So, the correct choice should be:



Note that LCA means last common ancestor.

Quote
Q9. Rhesus monkeys are the last common ancestor of gibbons, gorillas, and humans.

True

False

False
This verified answer contains over 560 words and 1 attached file(s).
Attached file
Thumbnail(s):
You must login or register to gain access to this attachment.

Related Topics

wrote...
2 years ago
Thanks for the help
wrote...
Educator
2 years ago
Thanks for the help

Welcome.. Let us know if you need further help
wrote...
2 years ago
Thank you!
wrote...
A year ago
Thanks
wrote...
A year ago
thanks
wrote...
A year ago
thank you so much
hru
wrote...
A year ago
thk
wrote...
A year ago
Thank you so much!
wrote...
A year ago
thank you so much!!
wrote...
A year ago
Thanks you!
wrote...
A year ago
Thank you
wrote...
A year ago
thanks dude
  New Topic      
Explore
Post your homework questions and get free online help from our incredible volunteers
  130 People Browsing
 714 Signed Up Today
Related Images
 1242
 172
 146