Mapping Flashcards
Genetic and physical maps differ in that _____.
A. the order of the genes are reversed
B. physical maps are based on recombination frequencies
C. genetic maps are based on base pairs
D. None of the above
D. None of the above
Which of the following mapping methods has the lowest resolution?
A. Recombination frequency
B. Restriction mapping
C. DNA sequencing
A. Recombination frequency
DNA fingerprinting _____.
A. generally employs the polymerase chain reaction
B. is used to identify individual people
C. analyzes short tandem repeats
D. All of the above
E. None of the above
D. All of the above
Compared to the original Sanger method of DNA sequencing, next-generation sequencing methodologies _____.
A. have made sequencing faster
B. allow hundreds of thousands to millions of DNA fragments to be simultaneously sequenced
C. Both a and b
D. None of the above
C. Both a and b
What is the most likely order of the linked genes R, S, and T if the distance between R and S is 22 m.u., the distance between S and T is 8 m.u., and the distance between R and T is 14 m.u.?
a. RST
b. STR
c.TRS
b. STR
From the cross AB/ab x ab/ab, what is the recombination frequency if the progeny numbers are 72 AB/ab, 68 ab/ab, 17 Ab/ab, and 21 aB/ab?
Select an answer and submit.
a. 0.213
b. 0.271
c. 0.500
d. 0.787
a. 0.213
An organism that has the haplotypes AB and ab with 12% recombination frequency, what is the % of gametes with ab haplotype?
44%
For single crossovers, the frequency of recombinant gametes is half because
a. a testcross between a homozygote and heterozygote produces ½ heterozygous and ½ homozygous progeny.
b. the frequency of recombination is always 50%.
c. each crossover takes place between only two of the four chromatids of a homologous pair.
d. crossovers occur in about 50% of meiosis.
c. each crossover takes place between only two of the four chromatids of a homologous pair.
