In Drosophila melanogaster, vestigial wings are determined by a recessive allele of a gene that is linked to a gene with a recessive allele that determines black body color. T. H. Morgan crossed black-bodied, normal-winged females and gray-bodied, vestigial-winged males. The F1 were all gray bodied, normal winged. The F1 females were crossed to homozygous recessive males to produce testcross progeny. Morgan calculated the map distance to be 17 map units. Which of the following information is correct about the testcross progeny?

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#Question id: 27682

#Unit 10. Ecological Principles

Which of the following cells can withstand temperatures down to–38°C?

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#Question id: 10901

#Unit 6. System Physiology – Plant

P-proteins have been characterized at the molecular level. P-proteins from the genus Cucurbita consist of two major proteins;

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#Question id: 22975

#Unit 7. System Physiology – Animal

1,25-dihydroxycholecalciferol stimulates the,

a. Secretion of phosphate ions from kidney

b. Secretion of calcium from kidney

c. Reabsorption of calcium from kidney

d. Reabsorption of phosphate ions from kidney

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#Question id: 12608

#Unit 10. Ecological Principles

The  amount of  chemical energy in  consumers? food that is  converted to  their own  new biomass during a  given time period is known as which of the following?

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#Question id: 5815

#Unit 8. Inheritance Biology

In the Ames test: