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MatroZZZ [7]
3 years ago
10

A child has sickle cell disease (ss) but neither parents is ill . What must be true of the parents genotype

Biology
1 answer:
Vilka [71]3 years ago
3 0
Both parents are Ss which means they possess both healthy and disease cells
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Select the first event of DNA replication.
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DNA is unzipped

Explanation:

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Which of the following samples has the greatest population density?
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The right answer is D.

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Number of inhabitants ÷ area (in km²) = number of inhabitants / km²



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B = 13000 organisms / m2


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Which of the following samples will have the greatest volume at STP?a. 22 g Neb. 22 g Hec. 22 g O2d. 22 g Cl2 e. All have the sa
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Answer:

22g of He

Explanation:

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In order to solve this given problem, we would first find the number of moles from the different masses of atoms and molecules given.

Number of moles = \frac{mass }{Molar mass}

Now, let us obtain the molar mass of the given atoms and elements:

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      Cl₂ = (35.5x2)gmol⁻¹ = 71gmol⁻¹

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Volume occupied by He at STP = 5.5 x 22.4 = 123.2dm³

Number of moles of O₂ = \frac{22}{32}  = 0.688mol

Volume occupied by O₂ at STP = 0.688 x 22.4 = 15.4mol

Number of moles of Cl₂ = \frac{22}{71} = 0.3099mol

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Waves and tides are the rise and fall of ocean water
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