The significance of totipotency is that:a
genes are not regularly lost during development.
b. most organisms can be easily cloned.
c. differentiation leads to the loss of certain genes in each cell.
d. somatic cells are incapable of differentiation.
e. unexpressed genes are lost during developm
A
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Which of the following is an example of monosomy?
A) Turner's syndrome B) Klinefelter's syndrome C) Down syndrome D) trisomy X
In a normal Drosophila embryo, a gap gene called Krüppel is expressed in the anterior end because it is activated by Hunchback protein, and this region contains a high level of Hunchback
A. true B. false
If you applied a toxin that blocked non-voltage-gated potassium channels (i.e., the potassium "leak channels") in a resting neuron, it would cause the membrane potential to be
A. less negative. B. more negative. C. No change would be observed.
A zygote
A. is haploid. B. contains all of the genes from each parent. C. is formed by meiosis. D. is genetically different from either parent.