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#Question id: 7090

In what way, if any, does the chromosomal determination of sex differ in Drosophila and humans?

#Unit 5. Developmental Biology
  1. In humans, the Y chromosome determines maleness, with female development being a default state, but in Drosophila, the presence of two X chromosomes determines femaleness, and male development is the default state.
  2. In humans, the Y chromosome determines maleness, but in Drosophila, the ratio of X chromosomes to autosomes determines maleness or femaleness.
  3. In humans, it is the presence of only one X chromosome that triggers male development, and two X chromosomes trigger female development, just as occurs in Drosophila.

  4. In human males, a single Y chromosome is present in the absence of an X chromosome, while in Drosophila, a single X chromosome is present in the absence of a Y chromosome.

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#Question id: 23882

#Unit 13. Methods in Biology

Plants are more readily manipulated by genetic engineering than are animals because
TLS Online TPP Program

#Question id: 28639

#Unit 2. Cellular Organization

Degradation of Sic1 is induced by___
TLS Online TPP Program

#Question id: 32352

#Unit 1. Molecules and their Interaction Relevant to Biology

The net free energy change, DG° of gluconeogenesis for the conversion of Pyruvate to glucose is 
TLS Online TPP Program

#Question id: 24531

#Unit 11. Evolution and Behavior

In some fruit-fly populations, two alleles are present at the locus that encodes ADH; Adhf, and Adhs , Female fruit flies with different Adh genotypes produce the following numbers of offspring;

Calculate the relative fitness of females having these genotypes?
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#Question id: 9251

#Unit 9. Diversity of Life Forms

Which of the following is responsible for the differences in summer and winter temperature stratification of deep temperate zone lakes?