BIO 351 MODULE 2 TEST QUESTIONS AND
CORRECT ANSWERS
Which of the following occurs for the first time in pachytene prophase I of
meiosis? - ANSWER Synapsis and crossing over occur
Synapsis only occurs during meiosis, which of the following accurately
describes this event? - 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? - 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? - 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? - 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. -
ANSWER low, glial cell derived neurotrophic factor (GDNF), follicle
stimulating hormone (FSH)
CORRECT ANSWERS
Which of the following occurs for the first time in pachytene prophase I of
meiosis? - ANSWER Synapsis and crossing over occur
Synapsis only occurs during meiosis, which of the following accurately
describes this event? - 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? - 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? - 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? - 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. -
ANSWER low, glial cell derived neurotrophic factor (GDNF), follicle
stimulating hormone (FSH)
