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WorksheetsRecombination
Total questions: 8
Worksheet time: 5mins
Name
Class
Date
1.
Crossing-over of parts of chromosomes:
a)
has no effect on genetic linkage
b)
usually decreases the number of genetic combinations in a population
c)
can increase the number of genetic combinations in a population
2.
What contributes to genetic variation?
a)
crossing over
b)
law of independent assortment
c)
law of segregation
d)
gene linkage
3.
Migration along the two heteroduplex strands, termed
a)
Migration
b)
Branch migration
c)
Cross migration
d)
Replication
4.
The map distance between the genes A & B is 3 units between B&C 10units and between C&A 7 units.The order of the genes in the linkage map constructed on the above data
a)
A,B,C
b)
A,C,B
c)
B,C,A
d)
B,A,C
5.
How did Morgan demonstrate crossing over?
a)
A fly that received only y+w+m+ and ywm chromosomes from her parents was able to transmit different combinations of alleles to her offspring.
b)
A fly with a gray body and red eyes (wild type) was able to produce offspring with gray bodies and white eyes.
c)
True breeding yellow, white, miniature flies always had yellow, white, miniature offspring.
d)
None of these examples demonstrate crossing over.
6.
1 map unit is equal to:
a)
1 nm
b)
1% recombination
c)
1 chromosome
d)
1 mutation
7.
What are the Enzymes takes part in the process of recombination
(a)
8.
Which enzyme plays the role of resolvase?
(a)
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