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A X-linked gene in cats controls coat color. The X ^ B allele produces black, and the X ^ b allele produces yellow. When heterozygous ( X ^B X^b), the coat color is calico. If a yellow female cat has one yellow kitten and three calico kittens, a/ what is the sex of the yellow kitten? b/ what is the color of the father of these kittens? c/ what does this tell you about the sex of any calico cat?
The endocrime and nervous system are main regulating systems of the body. However, the nervous system has been compared to an airmail delivery system, and endocrime system to the pony express. In brief explain this comparison.
What are the dimensions for B-DNA? including angles, base stacking, microheterogeneity.
Explain why examples such as the peppered moth, pesticide-resistant insects, and antibiotic-resistant bacteria do not demonstrate evolution.
When a tropical moth is touched on the thorax it lifts its forewings up abruptly, exposing its brightly coloured hind-wings. What causes the moth to behave this way? What significance can we attach to the fact that the verbal ability scores of ado..
You have a constitutive mutant, but you are not sure if it is constitutive due to a repressor mutation (i-) or an operator mutation (o^c). What would be a good experiment to determine whether the phenotype is due to a defective repressor (i-) or t..
In humans, blood types A and B are codominant with type O being recessive. List the blood types of the offspring of a father with blood type AB and a mother with type O.
Assume y ou are analyzing a dominant allele in fruit flies that mutates to a recessive allele at the relatively high rate of 10 -6 per generation.
The gecko is a reptile that has amazing ability to climb smooth surfaces even glass. Recent discoveries indicate that geckos stick to smooth surfaces via van der Waals interactions in septae on their feet and smooth surface.
An artificial cell containing 0.5 M glucose is placed in a beaker of 0.5 M NaCl. The membrane around the cell is permeable only to water.
You are a neuroengineer interested in developing better nerve stimulators for prothetic limbs, such as arms, hands or legs. You want to understnad the flow of ions across the typical nerve cell membrane during action potentials, or spikes.
A rather tame ltxnsp was recently found on Easter Island through a retired neurophysiologist. He reported the following measurements of ECF and ICF concentrations
Briefly explain why this mating produces a triploid individual. Why can mitosis proceed normally in triploid cells, but meiosis cannot.
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