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Daphnia is a type of water flea commonly found in lakes.

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Daphnia is a type of water flea commonly found in lakes.  [#permalink]

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New post 18 Oct 2018, 04:41
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Question Stats:

78% (01:13) correct 22% (01:41) wrong based on 46 sessions

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Daphnia is a type of water flea commonly found in lakes. Females can reproduce asexually, and they will either produce a male or female embryo depending on the stress level of their environment. If in a stressful environment a female has a 75% chance to reproduce asexually and the odds of a male being born are 2:1 then what is the probability that a female in this environment will asexually produce a male?

0.5
0.6
0.7
1.0
None of the above

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Re: Daphnia is a type of water flea commonly found in lakes.  [#permalink]

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New post 18 Oct 2018, 19:17
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eswarchethu135 wrote:
Daphnia is a type of water flea commonly found in lakes. Females can reproduce asexually, and they will either produce a male or female embryo depending on the stress level of their environment. If in a stressful environment a female has a 75% chance to reproduce asexually and the odds of a male being born are 2:1 then what is the probability that a female in this environment will asexually produce a male?

0.5
0.6
0.7
1.0
None of the above


in a stressful environment a female has a 75% chance to reproduce asexually - so \(\frac{3}{4}\) and
the odds of a male being born are 2:1, so \(\frac{2}{3}\)

the probability that a female in this environment will asexually produce a male = \(\frac{3}{4}*\frac{2}{3}=\frac{1}{2}\)=0.5

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Re: Daphnia is a type of water flea commonly found in lakes.   [#permalink] 18 Oct 2018, 19:17
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Daphnia is a type of water flea commonly found in lakes.

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