BIOLOGY HIGH SCHOOL

Alternative versions of genes

Answers

Answer 1
Answer: these alternative genes are called alleles

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Which best describes the interaction between DNA and RNA during protein synthesis?

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the answer is RNA because DNA for human .
I like this analogy: DNA is like a cook book, full of recipes. RNA is like the chef, taking the recipes and creating something.

in humans, the allele for hemophilia, h, is recessive. which is true of a woman with the genotype xhxh? a. the woman and all of her children are hemophiliacs. b. all of her sons will inherit the allele for hemophilia. c. she is a carrier of hemophilia but does not have the condition.

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The answer is b. all of her sons will inherit the allele for hemophilia.

Hemophilia is X-linked recessive disorder. It is known that there are two X chromosomes (one from a mother and one from a father) in females and one X chromosome (from the mother) and one Y chromosomes (from the father) in males. In females, X-linked recessive disorder has the same pattern of inheritance as an autosomal recessive disorder.
So, if xh is recessive and xH is dominant allele, a mother which has xhxh genotype has the condition (so, c is not the right answer). Further, if a father has no condition, thus his genotype is xHy, their daughters will be carriers but without the condition (so, the choice a could be right only if we know that the father has hemophilia too (xhy). Therefore, since the mother (xhxh) will give her x chromosome to her sons, they will all inherit the allele for hemophilia, and choice b. is the right answer.

She is a carrier of hemophilia but does not have the condition

(I got it correct on Gradpoint)

By locating active __________, geologists determine the likelihood of earthquakes in a region

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By locating active faults, geologists can determine the likelyhood of earthquakes in a region. A fault is a crack in the earth's surface along which movement occurs. Movement along faults cause earthquakes. Seismologists use various intruments such as GPS and seismographs to monitor movement along faults to attempt to predict the likelihood of a quake.
The word that would best complete the sentence, "By locating active ____, geologist determine the likelihood of earthquake in a region", is fault line. The presence of the fault lines increased the risk of a certain area to the disasters such as earthquake when there is a movement underground.

Compare and contrast the modes of locomotion in trypanosome,euglena,paramecium,and amoeba/chaos.

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Bacteria use flagella and cillia for locomotion

If two objects of the same size will always have the same mass?

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This is incorrect. Size and mass are not related. An example, a balloon that is filled with air can be compared to a bunch of iron that is of the same size yet it has much a smaller mass than the lump of iron.

What is the purpose of the peptide bond that is shown in The diagram

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It connects amino acids 
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