Answer:
Cystic fibrosis mutation is recessive to normal allele because only one functional or normal allele is enough to produce a functional protein. So, if mutation is present in one allele then also, a normal protein can be made from normal allele. The presence of normal protein prevents the expression of disease.
In addition, mutated allele only results in the loss of function of protein which can be compensated by the expression of normal allele. It does not add any toxic effect to the protein. Consequently, the disease is inherited in autosomal recessive fashion.
In contrast, Huntington mutation not only alters the structure of the functional protein but also adds toxicity to it. The altered protein is enable to interact with 100s of other proteins and inhibit or decrease their function. So, if only one allele is present then also, the mutated protein will be produced and it will result in the phenotype. Consequently, it is inherited as autosomal dominant fashion.
Answer;
As liquid water freezes, the molecules arrange themselves in a way that takes up more space than liquid water. What would most likely occur if the arrangement of frozen water molecules required less space than that of liquid water molecules? A).The density of ice would be greater than the density of liquid water, and ice would not float. B). Ice would form in layers, and liquid water would get trapped in between the layers. Liquid water would have a higher specific heat, making it less likely to undergo vaporization. C).The freezing point of water would decrease, making ice more difficult to form.
Answer:
In water cycle, water evaporates from the sea and oceans in the form of water vapors due to the radiation of the sun. This evaporation in the ocean is the starting point of water cycle.
Explanation:
Water cycle is also called hydrological cycle. In this cycle , water evaporates from water bodies such as rivers, seas, ponds and oceans etc. Water is also evaporated from plant bodies in the process of both evaporation and transpiration. This water moves in the form of vapors and forms clouds. These clouds moves to the land and fall on the earth surface in the form of rainfall and snowfall. From there, this water moves to the oceans through lakes and rivers and repeat the cycle again.
Answer:
Earthquakes and Volcano activity
Explanation:
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