ETHC 210 EXAM 2
Question 1
3 out of 3 points
Which one of the following trisomy conditions has a
85% survival rate at one year after birth?
Selected Trisomy
Answer: 21
Question 2
3 out of 3 points
Conception is significant in biological developmental
science because it involves two physical events which
show that it is the starting point for the beginning of
life of an individual. The two events which can be found
in some embryological text books confirming that
conception is the beginning of life are;
Selected The restoration of the diploid condition and the
Answer: genetic determination of gender
Question 3
3 out of 3 points
Maternal serum markers and ultrasound findings are
used to screen for elevated risk of trisomy in a fetus.
Selected Tru
Answer: e
Question 4
3 out of 3 points
Typically a human female will release approximately
________________ oocytes during her reproductive lifetime.
Selected 40
Answer: 0
Question 5
3 out of 3 points
, PCR has been used to amplify the DNA from a 7000 year
old mummy.
Selected Tru
Answer: e
Question 6
3 out of 3 points
About 30% of chromatin is histone.
Selected Tru
Answer: e
Question 7
3 out of 3 points
DNA is highly condensed and compacted to fit into the
cell nucleus. During its condensation process it first
wraps around a highly conserved protein called:
Selected Histo
Answer: ne
Question 8
3 out of 3 points
At the conclusion of meiosis I the two cells produced
are;
Selected haplo
Answer: id
Question 9
3 out of 3 points
There are two ways that chromosomes can be arranged
to produce Trisomy 21.
Selected Tru
Answer: e
Question 10
3 out of 3 points
XYY males were once considered to;
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