Bio 315- Exam 2 Multiple Choice

Question 1

Two genes that are on the same chromosome are said to be _______

Answer 1

Syntenic

Question 2

which process always produces haploid cells?

Answer 2

Meiosis

Question 3

Which of the following events takes place during Prophase of meiosis I and contributes to the independent assortment of alleles?

Answer 3

Homologous Recombination

Question 4

During DNA replication, one of the strands of DNA must be copied in a discontinuous fashion. Why is this the case?

Answer 4

because Okazaki fragments must be removed before replication can begin

Question 5

when is the only time that homologous pairs of chromosomes find each other, pair up, and crossover?

Answer 5

only during Prophase I of meiosis

Question 6

When scientists set up crosses of fruit flies to measure the degree of genetic linkage between two genes, they always use a testcross, not a dihybrid cross. Why is this?

Answer 6

Because it is easier to observe a deviation from the expected ratio of 1:1:1:1

Question 7

eukaryotes are capable of utilizing different combinations of exons within a gene in order to create multiple diverse protein products from a single gene. this process is called________

Answer 7

alternative splicing

Question 8

which of the following are added to a primary RNA transcript as it becomes a mature mRNA?

Answer 8

poly A tail

Question 9

when two double-stranded DNA sequences that are similar or identical come into close contact with each other, what is a possible result?

Answer 9

homologous recombination

Question 10

in term coding regions of the genome, and coding RNA (as opposed to noncoding RNA), the molecules that are being coded for are ________

Answer 10

proteins

Question 11

within the double helix structure off DNA the sugar phosphate backbone faces outward, and the nitrogen bases faces inward. this because the nitrogen bases are

Answer 11

hydrophobic