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A dig breeder discovers two of her puppies have abnormal genitalia. Chromosomal tests (cytogenetic analyses ) indicate that the male dog's karyotype lacks a Y chromosome, but instead has an XX chromosome pair, with one of the X-chromosome slightly larger than usual. Whereas, the female dog's karyotype reveals an XY chromosome pair, with Y-chromosome being slightly shorter than normal ( being mammals, male dogs are normally XY and females are XX).
a) Can you offer a chromosomal explanation of these two cases considering what you know about SRY gene?
if a test cross of AaBb produces equal numbers of AaBb, Aabb, aaBb, and aabb progeny, what can you conclude about the map distance between the two loci?
Suppose you remove your test cultures from the incubator and notice that one of them - a known fermenter - has a gas bubble in the Durham tube. Knowing that fermenters frequently produce gas, you ignore the bubble and proceed to the next step. Add..
After injecting glucose into the E. coli culture, there is a delay before the rate of oxygen consumption increases. What is causing this delay?
Suppose that a molecular clock has been operating since the divergence of two species, calculate the divergence rate, given that the amino acid difference is 20 percent.
What are the expected frequencies of three phenotypes (bald, red hair, yellow hair) in the male offspring of this cross? Imagine we observe 50 percent bald, 42 percent yellow hair, and 8 percent red hair. What is a recombination fraction between the ..
Suggest a suitable buffer range for each of the following substances.
Each olfactory receptor gene is involved in detecting specific odors. However, humans are losing OR genes, while mice and other mammals have ~1500 such genes, humans have ~900
A tumor is pressing against the superior orbital fissure on one side. Name one cranial nerve likely to be affected? What is one likely physical finding?
A set of monohybrid crosses is like those done by Mendel. Three-fourths of the F2 plants have purple-flowers and the rest have white-flowers. If a purple plant is picked at random and selfed, what is the probability that only purple-flowered plant..
A water sample was analyzed to determine the concentration of bacteria in it. It was diluted as follows: 1ml of sample placed in 9ml of sterile water (tube A) from this solution, from that another 1ml was placed in 9ml of sterile water (tube B) an..
A client was admitted to the hospital with hypertension. The development of arteriosclerosis associated with hypertension has further increased resistance to blood flow, worsening his hypertension. This is an example of what type of feedback loop?..
In maize the genes Pl for purple leaves (dominant over green leaves); sm for salmon silk ( recessive for yellow silk) and py for pigmy plant (recessive to normal size) are on chromosome 6 at positions 45, 55 and 65 respectively. Predict the propor..
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