1.
What does "lac" refer to, in what we call the lac operon
A.
Lactose
B.
Lactase
C.
Lac insect
D.
The number 1,00,000
Answer :
Lactose
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2.
A phenomenon which works opposite to the linkage is
A.
Independent assortment
B.
Crossing-over
C.
Segregation
D.
Mutation
Answer :
Crossing-over
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3.
When two hybrids Ttrr and Rrtt are crossed, the phenotypic ratio of offspring shell be
A.
3:1
B.
1:1:1:1
C.
1:1
D.
9:3:3:1
Answer :
1:1:1:1
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4.
A disease caused by an autosomal primary non-disjunction is :
A.
Klinefelter's Syndrome
B.
Turner's Syndrome
C.
Sickel Cell Anemia
D.
Down's Syndrome
Answer :
Down's Syndrome
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5.
Which of the following is the most primitive ancestor of man
A.
Homo habilis
B.
Ramapithecus
C.
Australopithecus
D.
Homo meanderthalensis
Answer :
Ramapithecus
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6.
Which of the following is important for speciation
A.
Seasonal isolation
B.
Reproductive isolation
C.
Behavioural isolation
D.
Tropical isolation
Answer :
Reproductive isolation
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7.
Which of the popular variety of wheat has been developed by mutation
A.
Triticale
B.
Kalyan Sona
C.
Sonalika
D.
Sharbati Sonora
Answer :
Sharbati Sonora
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8.
In Bonellia, all larvae are genetically and cytologically similar. In this worm male individuals live in the uterus of female. If a particular larva settle near proboscis of an adult female, it becomes a male individuals. If larva develops free in water it becomes
A.
Male individuals
B.
Female individuals
C.
Intersex
D.
Any of the above
Answer :
Female individuals
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9.
Mendelian monohybrid ratio is
A.
1:2:1
B.
3:1
C.
9:3:1
D.
9:3:4
Answer :
3:1
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10.
A normal woman whose father was albino, marries an albino man, what proportion of normal and albino are expected among their offsprings
A.
All normal
B.
2 normal : 1 Albino
C.
All albino
D.
1 normal: 1 Albino
Answer :
1 normal: 1 Albino
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