If short hair (L) is dominant to long hair (l), then
what fraction of the offspring produced by a cross of
Ll x ll will be homozygous dominant?
a. 1/2
b. 1/4
c. 1/3
d. none (no chance of this offspring)
e. none of these answers is correct
Answer: d
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Enzymes that are expressed at a constant level all the time are said to be .
A. inducible B. constitutive C. attenuated D. repressible
Leukocytosis-promoting factor, among other things, acts to encourage the movement of white blood cells to the site of an injury. Which hormone opposes this action?
A) epinephrine B) insulin C) TH D) cortisol
Which MAP kinase was found to be a signaling molecule for oocyte maturation in mice?
a. Mek and Raf b. Ras 1 and ERK 2 c. Raf 1 and Raf 2 d. Mek and ERK2 e. ERK 1 and ERK 2
Characteristics between the branch points of a cladogram that are shared by all organisms above the branch point and are not present in any below it are called
A. novel characters. B. ancestral characters. C. derived characters. D. homologous characters. E. homoplastic characters.