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Q1. In birds, sex is determined by the ZW chromosome scheme. Males are ZZ and females are ZW. A recessive lethal allele that causes death of the embryo is sometimes present on the Z chromosome in pigeons. What will be the sex ratio in the offspring of a cross between a male that is heterozygous for the lethal allele and a normal female?
Q2. A mammal uses only one to two percent of its energy in ventilation as a fish must spend about 15 percent of its energy to move water over its gills. Explain this huge difference in their efforts to collect oxygen.
Which declaration is NOT true about DNA replication. Replication can only begin at distinct regions known as origins of replication.
Application of an insecticide to control mosquito populations in malaria infested areas quickly resulted in a dominant mutation, R, resulting in insecticide resistance.
A patient lost a lot of blood during surgery and his blood pressure dropped from 120/80 to 90/50. Describe how the kidneys respond to this change in blood pressure.
What techniques would you utilize to detect this DNA sequence. Mechanical stress or trauma frequently triggers the symptoms of gouty arthritis in susceptible people. In this view elucidate why gouty arthritis affects the great toe more commonly than ..
What F1 phenotypic and genotypic ratios are formed from this cross . how may this affect the rate of protein synthesis.
Research global warming on Web and write the final report outlining the path for the U.S. to follow to address the issue of global warming. Include at least three proposals for the US to follow, plus use a minimum of three different websites or books..
How denaturing a protein alters the functions of that protein. If we are bleeding by the accident, why the injury has to be deeper than epidermis.
Compute the surface-area-to-volume ratio of a cube whose sides are 100 um in length to estimated the surface-area-to-volume ratio of the fern spore cell.
For in case, it is well established that in presynaptic neurons, the elevation of cytosolic calcium triggers the fusion of exocytotic vesicles that contain neurotransmitters to the plasma membrane.
A friend has just returned from a trans-Atlantic jet aircraft flight and reported that the plane dropped about1000 m when it entered an "air pocket." Explain to a friend what apparently happened to cause this drop.
Thirteen-year-old Ryan has begun to challenge many of his parents' values and to express his own set of highly idealistic standards. Compare and contrast the explanations for Ryan's behaviour that would be given by Kohlberg and by Erikson.
Soil stabilization is the permanent physical and chemical alteration of soils to enhance their physical properties. Stabilization can increase the shear strength of a soil and control the shrink-swell properties.
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