BIO 351 MODULE 6 TEST QUESTIONS AND
ANSWERS
Quiz 6.1 - ANSWER 1. In the developing embryo ______________ induces
female germ cells to enter _______________. Fill in the blanks with the best
answer.
- retinoic acid, meiosis
2. BMP4 and BMP8b are secreted from extraembryonic ectoderm at E7.0. In
response to these factors, competent cells at the posterior of the embryo will
_____, and _________________. Complete the statement.
- Express Fragilis and become primordial germ cells
3. Primordial germ cells follow a migratory path that is directed by which of the
following? Pick the best answer.
- Steel factor and c-Kit
4. Nanos2 transgenic mice had the following phenotype: (pick the best answer)
- Female and male Nanos2 transgenic mice did not enter meiosis embryonically.
Quiz 6.2 - ANSWER 1. The Wolffian duct contributes to which of the
following male gonadal structures?
- Vas deferens
2. A researcher is studying a transcription factor that is essential for the
formation of the mesonephric duct. Based on your knowledge of the developing
urogenital tract, which of the following defects would you predict that you will
find in mice when a knockout mutation has been made in this gene?
- Male mice will have defects of their efferent ducts, epididymis and vas
deferens
3. During the development of the gonads, _____________ and
______________ have the same embryonic origin. Fill in the blanks.
- Sertoli cells and granulosa cells
4. Which of the following is a TRUE statement?
- The initial gonad is bipotential, neither male nor female.
Quiz 6.3 - ANSWER 1. If you had 12 freshly laid Trachemys scripta eggs, and
you wanted to have equal numbers of male and female hatchlings, at which
temperature would you choose to incubate these eggs?
- 28.5°C
ANSWERS
Quiz 6.1 - ANSWER 1. In the developing embryo ______________ induces
female germ cells to enter _______________. Fill in the blanks with the best
answer.
- retinoic acid, meiosis
2. BMP4 and BMP8b are secreted from extraembryonic ectoderm at E7.0. In
response to these factors, competent cells at the posterior of the embryo will
_____, and _________________. Complete the statement.
- Express Fragilis and become primordial germ cells
3. Primordial germ cells follow a migratory path that is directed by which of the
following? Pick the best answer.
- Steel factor and c-Kit
4. Nanos2 transgenic mice had the following phenotype: (pick the best answer)
- Female and male Nanos2 transgenic mice did not enter meiosis embryonically.
Quiz 6.2 - ANSWER 1. The Wolffian duct contributes to which of the
following male gonadal structures?
- Vas deferens
2. A researcher is studying a transcription factor that is essential for the
formation of the mesonephric duct. Based on your knowledge of the developing
urogenital tract, which of the following defects would you predict that you will
find in mice when a knockout mutation has been made in this gene?
- Male mice will have defects of their efferent ducts, epididymis and vas
deferens
3. During the development of the gonads, _____________ and
______________ have the same embryonic origin. Fill in the blanks.
- Sertoli cells and granulosa cells
4. Which of the following is a TRUE statement?
- The initial gonad is bipotential, neither male nor female.
Quiz 6.3 - ANSWER 1. If you had 12 freshly laid Trachemys scripta eggs, and
you wanted to have equal numbers of male and female hatchlings, at which
temperature would you choose to incubate these eggs?
- 28.5°C
