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Genetic Basis Of Inheritance Mcq
Quiz 12
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Q.1
Male XX and female XY develop sometimes due to .... ... [ CBSE 2001 ]
0%
a) hormonal imbalance
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b) aneuploidy
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c) deletion
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d) transfer of segments between X and Y
Explanation
XX male syndrome is caused by the Y chromosome's SRY gene, which triggers male reproductive development, being atypically included in the crossing over of genetic information that takes place between the pseudoautosomal regions of the X and Y chromosomes during meiosis in the father. In female meiosis usually at least one crossover and exchange between all autosomal homologs and between the two X chromosomes; and higher recombination rates in female meiosis compared to male meiosis. XY gonadal dysgenesis, also known as Swyer syndrome. Mutations of SRY account for many cases of Swyer syndrome. Answer : (d)
Q.2
Match the columns ... .. [ Kerala 2007 ]
Column I
Column II
Sickle cell anaemia
a. 7th chromosome
Phenylketonuria
b. 4thchromosome
Cystic fibrosis
c. 11th chromosome
Huntington's disease
d. X-chromosome
Colour blindness
e. 12th chromosome
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a) 1 - a , 2 - c, 3 -d, 4 - b, 5 - e
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b) 1 - c , 2 - e, 3 -a, 4 - b, 5 - d
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c) 1 - b , 2 - c, 3 -d, 4 - e, 5 - a
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d) 1 - b , 2 - a, 3 -c, 4 - e, 5 - d
Explanation
Answer : (b)
Q.3
Blood does not stop coming out of a wound in ... ... [ AIIMS 2000 ]
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a) tetanus
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b) malaria
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c) haemophilia
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d) AIDS
Explanation
Answer : (c)
Q.4
Linked genes separate due to ... .. [ CPMT 1994]
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a) recombination
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b) Mutation
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c) Crossing over
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d) None of the above
Explanation
Answer : (c)
0 h : 0 m : 1 s
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