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The Notch signaling pathway functions in C. elegans vulval development. In a loss of function mutation of lin-12 Notch receptor none of the vulval precursor cells adopt 2° fate. Gain of function of lin-12 results in all vulval precursor cells adopting 2° fate. What kind of mutations in lin-12 would cause each of these phenotypes?
There are two different species of single-cell organisms living in the same environment. The two are identical except that the members of one species are four times larger than the other species.
The frequency of the dominant allele A in a population is 65% and the recessive allele a is 35%. Calculate the genotypic frequency within the population using the Hardy-Weinberg equation.
Calcium's atomic number is 20. It forms ions with 18 electrons. What is the electrical charge of a calcium ion? a.) +2 b.) +1 c.) -2 d.) -1
The following statement(s) is true about eukaryotic insulators.
The dye used in the Simmons Citrate Agar is called bromthymol blue. It is green at neutral pH and turns blue as alkalinity increases.
The following reaction is part of electron transport chain. Fill the reaction and identify which species is reduced. The abbreviation FMN represents flavin mononucleotide.
A true breeding wild-type strain of flies was crossed to another strain homozygous for the recessive X-linked mutant alleles m, r, and v. The F1 female offspring were testcrossed to a recessive strain of males. The following offspring were examine..
Osmotic balance is critical for fishes to maintain, particularly those that move between waters with differing concentration gradients of solutes, particularly salts.
Make 200 ml of 1 percent NaCl using a 10 percent stock solution of NaCl. How much stock solution is needed? How much water is needed?
explain some of the bioethical concerns related to screening for genetic diseases.
Two Hfr strains are isolated from a prototrophic coli strain. Both Hfr strains are mated with a Str(r) F- E. coli strain that is mutant for all the genes listed.
About 13 different species of finches inhabit the Galápagos Islands today, all descendants of a common ancestor from the South American mainland that arrived a few million years ago.
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