Mitochondrial DNA is useful for tracing ancestry because:
A. recombination rarely occurs.
B. mutations in mitochondrial DNA are rare;
mitochondrial DNA has relatively little
variation.
C. mutations in mitochondrial DNA are almost
always harmful.
D. both recombination and mutation in
mitochondrial DNA are rare.
E. both recombination and mutation in
mitochondrial DNA are rare, but when
mutations do occur, they are almost always
harmful.
A
You might also like to view...
100% ethanol is twice as effective as 60% ethanol at controlling bacteria
Indicate whether this statement is true or false.
Jorge has developed prostate cancer, so he undergoes an operation to remove the malignancy. What other structures will the cancer specialists look at to check for metastasis?
A) local arteries B) connecting veins C) neighboring lymph nodes D) portions of the liver
Free energy
A. includes the energy lost as heat. B. is the amount of energy gained by breaking bonds of a chemical. C. differs for a given reaction depending on the number of steps involved. D. always results in a decrease in total energy. E. is the amount of energy gained by breaking bonds of a chemical AND differs for a given reaction depending on the number of steps involved.
In a deletion hetero zygote, the normal chromosome will form what structure during pro phase of meiosis I?
A) inversion loop B) cruciform C) slipped despairing D) deletion loop