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: 19461

#Unit 13. Methods in Biology

Phase-contrast microscopy is suitable for observing which kind of sample?

1. Single cells 

2. Group of cells

3. Thin cell layers

4. Thick cell layers

Which of the following options is correct?

TLS Online TPP Program

#Question id: 19462

#Unit 13. Methods in Biology

Splitting of incident light and then recombining them to observe interference pattern occurs in which type of microscopy?

TLS Online TPP Program

#Question id: 19463

#Unit 13. Methods in Biology

DIC microscopy is used for visualizing 

1. Minute details

2. Thick objects

3. Thin objects

4. Larger details

Which among the following options is correct?

TLS Online TPP Program

#Question id: 19464

#Unit 13. Methods in Biology

Which is the common fixative agent that crosslinks amino groups on adjacent molecules

TLS Online TPP Program

#Question id: 19465

#Unit 13. Methods in Biology

In microscopy histological samples are often stained with which basic dye

TLS Online TPP Program

#Question id: 19466

#Unit 13. Methods in Biology

Hematoxylin is a basic dye which which basically bind to which amino acids?