Biology -- Two Random, Unrelated Questions

[sciencebooks]

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So... I've kind of, sort of started writing "SDN" on things I don't perfectly understand so sorry if my posting increases, but thanks so much as always.

1. "Higher levels of aldosterone results in concentrated urine." Does this mean that aldosterone actually reabsorb more water than ions? For example, I know ADH causes concentrated urine because it reabsorbs water only. But since aldosterone also reabsorbs ions, I thought it was dilute the concentration in a sense, but if it's pulling out water at a higher rate, than it makes sense that the urine is more concentrated... (Does my rambling even make sense? 😛)

2. "Given: X and Y recombinant frequency = 5%
X and Z recombinant frequency = 13%

A. What is the Y and Z recombinant frequency if the gene order is XYZ?

B. What is the Y and Z recombinant frequency if the gene order is YXZ?"

Answers: A. 8%, B. 18%

No idea how to solve this. I mean, I get that one would be addition, one would be subtraction, but yeah... Please help! 🙂

 

[shaboobly]

So... I've kind of, sort of started writing "SDN" on things I don't perfectly understand so sorry if my posting increases, but thanks so much as always.

1. "Higher levels of aldosterone results in concentrated urine." Does this mean that aldosterone actually reabsorb more water than ions? For example, I know ADH causes concentrated urine because it reabsorbs water only. But since aldosterone also reabsorbs ions, I thought it was dilute the concentration in a sense, but if it's pulling out water at a higher rate, than it makes sense that the urine is more concentrated... (Does my rambling even make sense? 😛)

2. "Given: X and Y recombinant frequency = 5%
X and Z recombinant frequency = 13%

A. What is the Y and Z recombinant frequency if the gene order is XYZ?

B. What is the Y and Z recombinant frequency if the gene order is YXZ?"

Answers: A. 8%, B. 18%

No idea how to solve this. I mean, I get that one would be addition, one would be subtraction, but yeah... Please help! 🙂

1) aldosterone effects the osmolarity outside the collecting duct by increasing the amount of sodium reabsorbed which then increases osmotic pressure and "pulls" water along in with it. ADH (vasopressin) just makes the collecting duct more "leaky" to water and thus concentrates the urine.
2) literally you take the letters and the percent is a unit of distance apart. you have to find the right order that gives the right distances (recombinate frequencies) between each of the letters.

 

[WalterWhite10]

So... I've kind of, sort of started writing "SDN" on things I don't perfectly understand so sorry if my posting increases, but thanks so much as always.

1. "Higher levels of aldosterone results in concentrated urine." Does this mean that aldosterone actually reabsorb more water than ions? For example, I know ADH causes concentrated urine because it reabsorbs water only. But since aldosterone also reabsorbs ions, I thought it was dilute the concentration in a sense, but if it's pulling out water at a higher rate, than it makes sense that the urine is more concentrated... (Does my rambling even make sense? 😛)

2. "Given: X and Y recombinant frequency = 5%
X and Z recombinant frequency = 13%

A. What is the Y and Z recombinant frequency if the gene order is XYZ?

B. What is the Y and Z recombinant frequency if the gene order is YXZ?"

Answers: A. 8%, B. 18%

No idea how to solve this. I mean, I get that one would be addition, one would be subtraction, but yeah... Please help! 🙂

Genetics question, I have no idea. lol but for the physiology one, aldosterone does reabsorb ions, specifically sodium. However, whne you ahve too much of aldosterone, it would lead to CRAP ton of reabsorption of sodium, which would lead thru a different mechanism to conserve water in the body and not get out. As a result, the urine would end up being more concentrated than it would be under normal conditions. Does that make sense?

 

[sciencebooks]

Genetics question, I have no idea. lol but for the physiology one, aldosterone does reabsorb ions, specifically sodium. However, whne you ahve too much of aldosterone, it would lead to CRAP ton of reabsorption of sodium, which would lead thru a different mechanism to conserve water in the body and not get out. As a result, the urine would end up being more concentrated than it would be under normal conditions. Does that make sense?

Ah, makes sense. Just maintaining homeostasis (or working to) by pulling in that extra water. Thanks.

 

[sciencebooks]

1) aldosterone effects the osmolarity outside the collecting duct by increasing the amount of sodium reabsorbed which then increases osmotic pressure and "pulls" water along in with it. ADH (vasopressin) just makes the collecting duct more "leaky" to water and thus concentrates the urine.
2) literally you take the letters and the percent is a unit of distance apart. you have to find the right order that gives the right distances (recombinate frequencies) between each of the letters.

At first, this made absolutely no sense, but then it clicked. It's like a simple math drawing, haha.

For the other poster,

A. X---Y---Z

Between X and Z = 18...
Between X and Y = 5...
So between Y and Z = 18 (total "length") - 5 (one fragment) = 3

B. Y---X---Z

Between Y and X = 5...
Between X and Z = 13...
So between Y and Z (total "length") = 5 (fragment) + 13 (fragment) = 18

 

[shaboobly]

yea lol number lines represent!