Which one of the following statements best defines artificial selection?

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#Question id: 363

#SCPH05 I Biotechnology

What is the pH of a mixture of 0.042 M NaH2PO4 and 0.058 M Na2HPO4? If 1.0 mL of 10.0 M NaOH is added to a liter of the buffer prepared, how much will the pH change? (pKa = 6.86)

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#Question id: 10959

#SCPH28 | Zoology

 Which of the following would best explain a prolonged bleeding time test?

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#Question id: 4133

#SCPH28 | Zoology

Which of the following statements about aminoacyl-tRNA synthetases is false?

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#Question id: 1082

#SCPH06 I Botany

Which of the following is a type of signaling in which a cells respond to substrate that they themselves release ?

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#Question id: 16132

#SCPH01 Biochemistry

You are running a human assisted reproduction clinic and providing state-of-the-art genetic diagnostic services. A married couple who already had a child with cystic fibrosis approach you because they wish to have another child, but only if they can be assured that the child will not have cystic fibrosis. You genotype the woman and discover that she is a heterozygote for Del508, the most common mutation causing cystic fibrosis. You suggest that the couple consider first polar body testing, in which several unfertilized oocytes (each with its first polar body) are retrieved from the woman, the first polar bodies are removed, and PCR tests are conducted on DNA from each of the first polar bodies. The couple agrees, and you obtain the following results:

 

the observation that the polar bodies for oocytes #1 and #5 test positive for both Del508 and the wild type sequence, because