10) given all the bad things that mutations do, it seems counterintuitive that even a low rate of mutation is actually good. What good could possible come of mutation?
a) mutation is needed if DNA is ever to be replicated
b) mutation is essential to prevent cancer
c) mutation is needed when we are fighting an infection
d) mutation is essential if populations are to evolve over time
e) mutation is needed for DNA to encode proteins
11) how are homologous chromosomes separated?
a) by the microtubule spindles
b) by the sister chromatids
c) by the mitochondria
d) by the nucleolus
12) recessive genetic disorders
a) are less common than dominant disorders
b) are carried by heterozygous individuals
c) require one mutant gene to be expressed
d) cannot be x-linked
2007-07-14 17:16:58 · 3 answers · asked by thanh h 1 in Science & Mathematics ➔ Biology
10. d) mutation is essential if populations are to evolve over time
(mutations are usually not good, but once in a great while they are, and they are ultimately the source of improved genes)
11. a) by the microtubule spindles
12. b) are carried by heterozygous individuals
2007-07-14 17:24:41 · answer #1 · answered by BP 7 · 3⤊ 0⤋
You implied one question, so I answer one.
10. D Mutation is essential if populations evolve over time.
Badly phrased question. Mutations come in 3 flavors; bad, good and neutral. The former being the greatest proportionately, by far.
2007-07-14 17:24:41 · answer #2 · answered by Anonymous · 1⤊ 0⤋
10-d 11-a 12-b
2007-07-14 17:46:34 · answer #3 · answered by berryfremont 2 · 0⤊ 0⤋