ETHC 210 EXAM 2 (100% CORRECT) | SCORE 75 OUT OF 75 POINTS : LIBERTY UNIVERSITY

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? • 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; • 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. • Question 4 3 out of 3 points Typically a human female will release approximately ________________ oocytes during her reproductive lifetime. • Question 5 3 out of 3 points PCR has been used to amplify the DNA from a 7000 year old mummy. • Question 6 3 out of 3 points About 30% of chromatin is histone. • 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: • Question 8 3 out of 3 points At the conclusion of meiosis I the two cells produced are; • Question 9 3 out of 3 points There are two ways that chromosomes can be arranged to produce Trisomy 21. • Question 10 3 out of 3 points XYY males were once considered to; • Question 11 3 out of 3 points The oocyte is roughly________________ times larger in volume than the sperm. • Question 12 3 out of 3 points Telomeres are found on the end of chromosomes. • Question 13 3 out of 3 points Which of the following is true about gametes? • Question 14 3 out of 3 points Which of the following is true about chromatin in chromosomes? • Question 15 3 out of 3 points This scientist was important in that she obtained an x-ray photo of DNA which helped determine its structure: • Question 16 3 out of 3 points Which of the following is true about karyotypes? • Question 17 3 out of 3 points In order to work with DNA in the lab to look at it sequence a lot of DNA is typically needed since it is so small. Many copies of DNA are made using a process called; • Question 18 3 out of 3 points Which of the following is true about Trisomy 21? • Question 19 3 out of 3 points Meiosis II is also called equational division. • Question 20 3 out of 3 points The single building block unit of DNA is the nucleotide. • Question 21 3 out of 3 points DNA replication is a complex process involving many proteins including a protein which unwinds DNA called helicase. • Question 22 3 out of 3 points One way that RNA is different from DNA is that it contains ribose instead of deoxyribose which is part of DNA. • Question 23 3 out of 3 points Meiosis in the female gametes which results in an oocyte is called oogenesis. • Question 24 3 out of 3 points Homologous pairs of chromosomes line up at the beginning of meiosis I and meiosis II. • Question 25 3 out of 3 points Which of the following are true about genetics testing of the fetus for chromosome abnormalities?