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Each of three botanists made a hypothesis regarding specimens of a par

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chetan2u
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Each of three botanists made a hypothesis regarding specimens of a par [#permalink] Each of three botanists made a hypothesis regarding specimens of a par   05 Mar 2024, 19:27
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Each of three botanists made a hypothesis regarding specimens of a particular plant species:
  • Botanist 1: Any individual specimen possessing the gene for curly stems has either the gene for long roots or the gene for purple flowers, or both.
  • Botanist 2: Any individual specimen possessing the gene for long roots has either the gene for flat leaves or the gene for round seeds, or both.
  • Botanist 3: No individual specimen that possesses either the gene for curly stems or the gene for flat leaves or both has the gene for purple flowers.
The discovery of an individual specimen of the plant species in question having the gene for __1__ but NOT the gene for __2__ would show that at least one of the three hypotheses described is incorrect.

Select for 1 and for 2 the characteristics that would most accurately complete the statement, based on the information given. Make only two selections, one in each column.­
1 2
curly stems
flat leaves
long roots
purple flowers
round seeds
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1: curly stems 2: long roots
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chetan2u
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Re: Each of three botanists made a hypothesis regarding specimens of a par [#permalink] Each of three botanists made a hypothesis regarding specimens of a par   05 Mar 2024, 19:49
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Re: Each of three botanists made a hypothesis regarding specimens of a par [#permalink] Each of three botanists made a hypothesis regarding specimens of a par   07 Mar 2024, 04:40
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1st: curly -> long/purple/both
2nd: long -> flat/round/both
3rd: No curly/flat/both -> purple

Base on this: 3rd hypothesis conflicts with 1st on the case curly -> purple. Therefore, one of these Hypotheses or both might be incorrect
1st is incorrect when curly -> NO long OR NO Purple
3rd is incorrect when curly/flat/both -> purple

If blank 1 curly, blank2 NO long, and 3rd is correct NO curly-> purple, then curly -> NO long OR NO Purple => 1st is incorrect
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Re: Each of three botanists made a hypothesis regarding specimens of a par [#permalink] Each of three botanists made a hypothesis regarding specimens of a par   07 Mar 2024, 06:43
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chetan2u wrote:
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According to first statement if they have curly stems then they either have long roots or purple flower
According to last statement if they have curly stems then they can't have purple flower
Combining these two, the specimen has only long roots

So if the specimen has curly stems but no long roots then 1st statement will be invalid

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Re: Each of three botanists made a hypothesis regarding specimens of a par [#permalink] Each of three botanists made a hypothesis regarding specimens of a par   10 Mar 2024, 02:59
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KarishmaB how do we approach suh questions systematically and organize the info in our mind
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Re: Each of three botanists made a hypothesis regarding specimens of a par [#permalink] Each of three botanists made a hypothesis regarding specimens of a par   11 Mar 2024, 00:31
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All Data Insight question: TPA [ Official Guide DI Review 2023-24] 


Each of three botanists made a hypothesis regarding specimens of a particular plant species:
  • Botanist 1: Any individual specimen possessing the gene for curly stems has either the gene for long roots or the gene for purple flowers, or both.
  • Botanist 2: Any individual specimen possessing the gene for long roots has either the gene for flat leaves or the gene for round seeds, or both.
  • Botanist 3: No individual specimen that possesses either the gene for curly stems or the gene for flat leaves or both has the gene for purple flowers.
The discovery of an individual specimen of the plant species in question having the gene for __1__ but NOT the gene for __2__ would show that at least one of the three hypotheses described is incorrect.

Select for 1 and for 2 the characteristics that would most accurately complete the statement, based on the information given. Make only two selections, one in each column.­

As I map my data, I see there is a problem. B1 says curly stems means long roots or purple flowers.
But B3 says curly stems or flat leaves cannot have purple flowers.

So if a specimen has curly stem but not long roots, as per B1, it must have purple flowers. But as per B3, a specimen with curly stems cannot have purple flowers. 
Hence if a specimen has curly stem but not long roots, one botanist becomes incorrect. 

ANSWER
1 - Curly Stems
2 - Long Roots

 


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Each of three botanists made a hypothesis regarding specimens of a par [#permalink] Each of three botanists made a hypothesis regarding specimens of a par   13 Apr 2024, 04:13
 
chetan2u wrote:
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­I'll add my 2 cents on it. Let's denote curly stems -> cs long roots -> lr purple flowers ->pf  flat leaves -> fl.

Gathering on a table the assumptions of B1,B3 (since they have most elements in common) and we use + for having and - for not having (see the table below) we can see that for all 4 elements apart from cs and lr, both botanists agree on having or not having. So, these two (cs,lr) will fill in the blanks. If it has cs but not lr then the first botanist is mistaken. But also, if it has lr but not cs then the last one is wrong. We choose the first one (the highlighted) because in the statements given the cs is in the if clause whereas the lr in the result clause?

ScottTargetTestPrep manasp35 KarishmaB chetan2u
           B1          B3
cs        +            +

fl        -              -

pf       +            +

lr        +            -­
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Each of three botanists made a hypothesis regarding specimens of a par [#permalink]
13 Apr 2024, 04:13
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