Evidence in the genome
1.[3p] Why is a shared error better evidence of common ancestry than a shared correct feature?
Why is a shared error better evidence of common ancestry than a shared correct feature?
The answer is: Both scribes could copy a correct reading from different sources, but a unique mistake has no cause except a shared exemplar
The answer is: Both scribes could copy a correct reading from different sources, but a unique mistake has no cause except a shared exemplar
The answer is: Both scribes could copy a correct reading from different sources, but a unique mistake has no cause except a shared exemplar
2.[2p] About what percentage of the human genome consists of endogenous retrovirus sequence?
About what percentage of the human genome consists of endogenous retrovirus sequence?
3.[3p] A critic says retroviruses have preferred insertion sites, so shared positions could be coincidence. What answers this without appealing to probability?
A critic says retroviruses have preferred insertion sites, so shared positions could be coincidence. What answers this without appealing to probability?
The answer is: Inherited elements share every mutation that arose before the split and sit in identical flanking sequence
The answer is: Inherited elements share every mutation that arose before the split and sit in identical flanking sequence
The answer is: Inherited elements share every mutation that arose before the split and sit in identical flanking sequence
4.[3p] Why is a broken GULO gene stronger evidence than a working one would be?
Why is a broken GULO gene stronger evidence than a working one would be?
The answer is: A working gene is explained by shared requirements, and a broken one has no functional explanation at all
The answer is: A working gene is explained by shared requirements, and a broken one has no functional explanation at all
The answer is: A working gene is explained by shared requirements, and a broken one has no functional explanation at all
5.[3p] The descent account predicts that the human and guinea pig GULO pseudogenes carry the same disabling mutations.
The descent account predicts that the human and guinea pig GULO pseudogenes carry the same disabling mutations.
The answer is: False
6.[3p] Which features must a human chromosome show if it is a fusion of two ancestral ape chromosomes?
Which features must a human chromosome show if it is a fusion of two ancestral ape chromosomes?
Select all that apply
The answer is: Degenerate telomere repeats facing head to head somewhere in its middle, The remains of a second, silenced centromere, A banding pattern matching two ape chromosomes laid end to end
7.[2p] Humans have 23 pairs of chromosomes. How many pairs do chimpanzees, gorillas and orangutans have?
Humans have 23 pairs of chromosomes. How many pairs do chimpanzees, gorillas and orangutans have?
8.[2p] What is the six-base sequence repeated at vertebrate telomeres?
What is the six-base sequence repeated at vertebrate telomeres?
9.[3p] Match each genomic observation to what it is evidence of.
Match each genomic observation to what it is evidence of.
One genetic code across all life
200,000 matching retrovirus sites
A disabled vitamin C gene
Human chromosome 2
two ancestral chromosomes fused in one lineage
descent from a single ancestral population
shared insertions inherited from a common ancestor
a function lost once and inherited since
Show the answer
One genetic code across all life: descent from a single ancestral population 200,000 matching retrovirus sites: shared insertions inherited from a common ancestor A disabled vitamin C gene: a function lost once and inherited since Human chromosome 2: two ancestral chromosomes fused in one lineage