Transgenic salmon are genetically engineered to grow faster than their wild type counterparts. They do not grow
larger; they simply reach their full size in shorter time. Transgenic salmon that are grown in outdoor pens are all sterile
(non-reproducing) females. Why is this important? What will be an ideal response?
If the transgenic fish escape from their outdoor pens, they could interbreed with the wild
population. Salmon that grow more quickly would out-compete the wild fish for food and
mates; therefore, the wild population may die out. To prevent this scenario from occurring,
all transgenic salmon grown in outdoor pens are sterile females.
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Synthetic compounds that inhibit receptors by preventing the natural messenger from binding are known as
A) agonists. B) receptor upregulators. C) specific proteoglycans. D) syndecans. E) antagonists.
The expression of only one allele of a gene and silencing of the other allele, all based on which parent
contributed each allele, is
a. sex-linked inheritance. b. uniparental inheritance. c. cytoplasmic inheritance. d. genomic imprinting. e. maternal inheritance.
Which of the following characteristics of light is most commonly used for defining light as a portion of the electromagnetic spectrum?
a. the fact that all living organisms can detect it b. the fact that plants can detect it c. the fact that humans can detect it with their eyes d. the fact that non-human animals can detect it with their eyes
Diffusion of morphogens influences the differential expression of other genes such as __________, which govern the formation of specific body parts.
Fill in the blank(s) with the appropriate word(s).