BIO 351 Module 2 Test
QUESTIONS AND VERIFIED
CORRECT ANSWER GRADED
A+ 100% GUARANTEED PASS
LATEST[2026-2027]
Which of the following occurs for the first time in pachytene prophase I
of meiosis? - CORRECT ANSWER-Synapsis and crossing over occurs
Synapsis only occurs during meiosis, which of the following accurately describe this event? -
CORRECT ANSWER-Formation of a bivalent on specialized protein structure
The Tasmanian devil, Sarcophilus harrissi, has 14 chromosomes. If nondisjunction of
chromosome 5 occurs in meiosis I, which of the following best describes the n of the resulting
gametes? - CORRECT ANSWER-Two germ cells will be n=8 and two will be n=6
Above is karyotype of your patient. Which of the following BEST describes what you would tell
this patient's parents? - CORRECT ANSWER-This is a 48 XXY, two extra chromosomes
You have made a transgene that expresses green fluorescent protein (GFP) in spermatogonia
only. If you are examining a transverse section of the testes where would you expect to find GFP
positive (GFP+) cells? - CORRECT ANSWER-Associated with the Sertoli cells in the seminiferous
tubule.
, The switch from mitosis to meiosis in spermatogenesis is regulated by _____ levels of _______
and this is induced by _________. Fill in the blanks. - CORRECT ANSWER-low, glial cell derived
neurotrophic factor (GDNF), follicle stimulating hormone (FSH)
Spermatozoa nuclei are transcriptionally silent. Which of the following BEST explains this? -
CORRECT ANSWER-Replacement of histones with protamines
Two mice were treated with Busulfan A that kills spermatogenic cells. The seminiferous tubules
of one mouse were transplanted with spermatogonia and the status of spermatogenesis was
examined in both mice one month later. What is the most likely outcome of this experiment? -
CORRECT ANSWER-Only the mouse that received spermatogonia will re-establish
spermatogenesis.
An oogonium enters ____________ embryonically and is blocked at _____________ until sexual
maturity. Fill in the blanks. - CORRECT ANSWER-meiosis: diplotene I
In the ovary, oocytes are held at metaphase II of meiosis until fertilization. How is this block
released? - CORRECT ANSWER-A Ca2+ influx induces the activity of calmodulin, which induces
Camodulin dependent kinase (CAM PKII) and calpain and they degrade cystostatic factor (CSF).
If you have a defect that blocks the release of gonadotropin releasing hormone (GnRH) from the
pituitary, which of the following statements about folliculogenesis would be true? - CORRECT
ANSWER-A lack of GnRH would inhibit folliculogenesis.
During the menstrual cycle, there is an increase of __________ midcycle, which stimulates a
surge of __________ and induces the synthesis of progesterone by granulosa cells. Fill in the
blanks. - CORRECT ANSWER-estrogen; luteinizing hormone
QUESTIONS AND VERIFIED
CORRECT ANSWER GRADED
A+ 100% GUARANTEED PASS
LATEST[2026-2027]
Which of the following occurs for the first time in pachytene prophase I
of meiosis? - CORRECT ANSWER-Synapsis and crossing over occurs
Synapsis only occurs during meiosis, which of the following accurately describe this event? -
CORRECT ANSWER-Formation of a bivalent on specialized protein structure
The Tasmanian devil, Sarcophilus harrissi, has 14 chromosomes. If nondisjunction of
chromosome 5 occurs in meiosis I, which of the following best describes the n of the resulting
gametes? - CORRECT ANSWER-Two germ cells will be n=8 and two will be n=6
Above is karyotype of your patient. Which of the following BEST describes what you would tell
this patient's parents? - CORRECT ANSWER-This is a 48 XXY, two extra chromosomes
You have made a transgene that expresses green fluorescent protein (GFP) in spermatogonia
only. If you are examining a transverse section of the testes where would you expect to find GFP
positive (GFP+) cells? - CORRECT ANSWER-Associated with the Sertoli cells in the seminiferous
tubule.
, The switch from mitosis to meiosis in spermatogenesis is regulated by _____ levels of _______
and this is induced by _________. Fill in the blanks. - CORRECT ANSWER-low, glial cell derived
neurotrophic factor (GDNF), follicle stimulating hormone (FSH)
Spermatozoa nuclei are transcriptionally silent. Which of the following BEST explains this? -
CORRECT ANSWER-Replacement of histones with protamines
Two mice were treated with Busulfan A that kills spermatogenic cells. The seminiferous tubules
of one mouse were transplanted with spermatogonia and the status of spermatogenesis was
examined in both mice one month later. What is the most likely outcome of this experiment? -
CORRECT ANSWER-Only the mouse that received spermatogonia will re-establish
spermatogenesis.
An oogonium enters ____________ embryonically and is blocked at _____________ until sexual
maturity. Fill in the blanks. - CORRECT ANSWER-meiosis: diplotene I
In the ovary, oocytes are held at metaphase II of meiosis until fertilization. How is this block
released? - CORRECT ANSWER-A Ca2+ influx induces the activity of calmodulin, which induces
Camodulin dependent kinase (CAM PKII) and calpain and they degrade cystostatic factor (CSF).
If you have a defect that blocks the release of gonadotropin releasing hormone (GnRH) from the
pituitary, which of the following statements about folliculogenesis would be true? - CORRECT
ANSWER-A lack of GnRH would inhibit folliculogenesis.
During the menstrual cycle, there is an increase of __________ midcycle, which stimulates a
surge of __________ and induces the synthesis of progesterone by granulosa cells. Fill in the
blanks. - CORRECT ANSWER-estrogen; luteinizing hormone
