If the diploid number of chromosomes in mouse somatic cells is 40, how many chromosomes are present during
prophase I?
a. 40, each comprised of a single paternal or maternal chromosome
b. 80, each comprised of a pair of homologous chromosomes
c. 20, each comprised of a single sister chromatid
d. 80, each comprised of a single sister chromatid
e. 40, each containing a pair of sister chromatids
ANSWER: e
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You find a leaf that has large stomata and a thick, waxy covering. What is clear about the original plant?
A) The plant minimizes water loss. B) The plant minimizes nutrient uptake. C) The plant minimizes sunlight uptake. D) The plant maximizes nutrient uptake.
Biodiversity is desirable for the biosphere and therefore for humans and human-induced extinctions are undesirable are two of the ____ principles of conservation biology.
Fill in the blank(s) with the appropriate word(s).
What is the equilibrium value of F for a population of constant size Ne = 5,000 that ex-periences a mutation rate of 0.00005?
a. 0 b. 0.15 c. 0.30 d. 0.50 e. None of the above
If neutral mutations occur at the rate of 0.000005 per individual, the rate of substitu-tions in that population will equal:
a. 2Ne*0.000005. b. (1/2Ne)*0.000005. c. 2Nek?*0.000005. d. 0.000005. e. None of the above.