Practice Questions

TLS Online TPP Program

#Question id: 7136

What is the molecular activity of the Sex-lethal protein of Drosophila?

#Unit 5. Developmental Biology

Sex-lethal is a transcription factor that activates female-specific genes.
Sex-lethal is a repressor of the transcription of male-specific genes.
Sex-lethal controls the splicing of specific mRNAs such that certain proteins required for female development are produced only in females.
Sex-lethal protein is equivalent to testosterone in mammals, in determining male development.

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TLS Online TPP Program

#Question id: 15387

#Unit 8. Inheritance Biology

How might the results of Bernard Davis's U tube experiment have been different if each strain were only mutant for a single gene?

TLS Online TPP Program

#Question id: 15388

#Unit 8. Inheritance Biology

What do transduction, transformation, and conjugation have in common?

TLS Online TPP Program

#Question id: 15389

#Unit 8. Inheritance Biology

Why is tetrad analysis useful for studying genetics?

TLS Online TPP Program

#Question id: 15390

#Unit 8. Inheritance Biology

Formation of the following pattern in an ordered octad is due to what event during meiosis? Pattern: AAaaaaaAA

TLS Online TPP Program

#Question id: 15391

#Unit 5. Developmental Biology

In the initiation of the vertebrate eyes, paired regions of the brain bulge out and approach the anterior region of -------germ layer:

TLS Online TPP Program

#Question id: 15392

#Unit 5. Developmental Biology

If an optic vesicle from a Xenopus laevis embryo is placed underneath head ectoderm in a different part of the head from where the frog’s optic vesicle normally occurs then what happens?