| Question | Answer |
| Question 1 How many total chromosomes are in the human body? | Answer 1 46
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Question 2 What is a karyotype? | Answer 2 A picture of one's chromosomes.
| Question 3 What are the three main parts of a nucleotide? | Answer 3 a.sugar molecule b. phosphate c. nitrogen bases
| Question 4 The first 22 pairs of chromosomes are called ___? | Answer 4 autosomes
| Question 5 Who determines the sex of an offspring? | Answer 5 Males
| Question 6 What criteria are used to pair up chromosomes on a karyotype? | Answer 6 a.Size b. location of the centromere c. banding or staining patterns
| Question 7 What is the shape of the DNA molecule? | Answer 7 double helix
| Question 8 What does DNA stand for? | Answer 8 Deowyribonucleic Acid
| Question 9 List the four types of nitrogen bases? | Answer 9 adenine,guanine,cytosine, and thymine
| Question 10 What two nitrogen bases are connected with a two hydrogen bonds? | Answer 10 Adenine and Thymine
| Question 11 | What three scientist were credited with the discovery of DNA? | Question 12 What female scientist work on the DNA model and x-ray crystals? | Answer 12 Rosalind Franklin
| Question 13 What scientist is credited with discovering that A-T and C-G? | Answer 13 Erwin Chargaff
| Question 14 What are the two nucleotides that are called pyrimidines because they have a single ring? | Answer 14 C-T cytosine and thymine
| Question 15 What does HeLa stand for? | Answer 17 Henrietta Lacks
| Question 16 Where are chromosomes located in the cell? | Answer 16 Nucleus
| Question 17 What is the exchange of DNA between homologous chromosomes during meiosis? | Answer 17 Crossing-Over
| Question 18 What are gametes? | Answer 18 sex cells (sperm and egg)
| Question 19 At what phase are the chromosomes suspended for preparing a karyotype? | Answer 19 Metaphase
| Question 20 A gene disorder caused by a mutation in connective tissue? | Answer 20 Marfan syndrome
| Question 21 A chromosome disorder showing an XXY on pair 23 is known as? | Answer 21 Klinefelter's syndrome. |
