Question 1
Which of these conditions is caused by nondisjunction of autosomal chromosomes?
XO-Turner syndrome
Trisomy 21-Down syndrome
XXY-Kleinfelter syndrome
Trisomy X-Meta female
Question 2
What is the cause of about one-third of all cancer deaths?
Smoking tobacco
Exposure to viruses
Exposure to ultraviolet light
Exposure to high-energy radiation
Question 3
DNA is often likened to an instruction manual. According to this analogy, the typographical errors that would inevitably result when the DNA "manual" is transcribed would be similar to:
dominant alleles.
recessive alleles.
mutant alleles.
homologous chromosomes.
Question 4
Which of the following pairs of people would provide the most useful information to geneticists, regarding the heritability of a certain trait?
non-twin siblings separated into different households soon after birth
monozygotic twins separated into different households soon after birth
non-twin siblings raised in the same household since birth
monozygotic twins raised in the same household since birth
Question 5
DNA is double stranded and similar in structure to a twisted rope latter composed of nitrogenous bases paired with hydrogen bonds in what order?
Adenine and cytosine, thymine and guanine
Adenine and thymine, guanine and cytosine
DNA replication and DNA polymerase
Sister chromatids and centromere