ETHC 210 Exam 2 - Questions and Answers

ETHC 210 Exam 2 Question 1 Which one of the following trisomy conditions has a 85% survival rate at one year after birth? Question 2Conception 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 Maternal serum markers and ultrasound findings are used to screen for elevated risk of trisomy in a fetus. Question 4 Typically a human female will release approximately oocytes during her reproductive lifetime. Question 5 PCR has been used to amplify the DNA from a 7000 year old mummy. Question 6 About 30% of chromatin is histone. Question 7DNA 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 At the conclusion of meiosis I the two cells produced are; Question 9 There are two ways that chromosomes can be arranged to produce Trisomy 21. Question 10 XYY males were once considered to; Question 11 The oocyte is roughly times larger in volume than the sperm. Question 12 Telomeres are found on the end of chromosomes. Question 13 Which of the following is true about gametes? Question 14 Which of the following is true about chromatin in chromosomes? Question 15 This scientist was important in that she obtained an x-ray photo of DNA which helped determine its structure: Question 16 Which of the following is true about karyotypes? Question 17 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 Which of the following is true about Trisomy 21? Question 19 Meiosis II is also called equational division. Question 20 The single building block unit of DNA is the nucleotide. Question 21 DNA replication is a complex process involving many proteins including a protein which unwinds DNA called helicase. Question 22 One way that RNA is different from DNA is that it contains ribose instead of deoxyribose which is part of DNA. Question 23 Meiosis in the female gametes which results in an oocyte is called oogenesis. Question 24 Homologous pairs of chromosomes line up at the beginning of meiosis I and meiosis II. Question 25 Which of the following are true about genetics testing of the fetus for chromosome abnormalities?