1. A
   Darwin
2. B
   Watson and crick
3. C
   Friedrich
4. D
   Weismann mishear

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1. A
   Centriole
2. B
   Centromere
3. C
   Spindle
4. D
   Aster

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1. A
   Factors reside in chromosomes
2. B
   Segregation of factors
3. C
   Dominant trait
4. D
   Independent assortment

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1. A
   height of pea plant is not governed by gene 'T' or 't'
2. B
   tallness is the recessive trait
3. C
   shortness is the dominant trait
4. D
   tallness is the dominant trait

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1. A
   46
2. B
   23
3. C
   92
4. D
   44

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1. A
   75%
2. B
   25%
3. C
   100%
4. D
   50%

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1. A
   Stanley and miller
2. B
   Gregor Mendel
3. C
   Lamarck
4. D
   Darwin

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1. A
   two members of a family
2. B
   two individuals of a species
3. C
   two species of a genus
4. D
   two genera of two families

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1. A
   either boy or girl
2. B
   girl
3. C
   X-chromosome does not determine the sex of a child
4. D
   boy

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1. A
   Statement (iii) is correct.
2. B
   Statement (vi) is correct.
3. C
   Statement (ii) is correct.
4. D
   Statement (i) is correct.

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1. A
   9 : 3 : 3 : 1
2. B
   9 : 1 : 1 : 3
3. C
   1 : 2 : 1
4. D
   1 : 3

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1. A
   Ailuropoda
2. B
   Chryseinys picta
3. C
   Drosophila melanogaster
4. D
   Pavo cristatus

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1. A
   Cytosine
2. B
   Deoxyribose sugar
3. C
   Guanine
4. D
   Adenine

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1. A
   Histones
2. B
   Proteins
3. C
   RNA
4. D
   DNA

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1. A
   10
2. B
   90
3. C
   30
4. D
   20

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1. A
   H.G Khurana
2. B
   Sir Archibald Garrod
3. C
   Gregor Mendel
4. D
   Charles Darwin

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1. A
   The allele for height has at least two different genes.
2. B
   There are at least two different alleles for the gene for height.
3. C
   There is one allele for height with two different forms.
4. D
   There are two different genes for height, each having a single allele.

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1. A
   TT : tt
2. B
   TT : Tt
3. C
   TT : Tt : tt
4. D
   Tt : tt

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1. A
   This disease is due to an X-linked recessive mutation
2. B
   A greater proportion of girls die in infancy
3. C
   This disease is due to an X-linked dominant trait
4. D
   This disease is due to a Y-linked recessive mutation

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1. A
   Weismann
2. B
   Darwin
3. C
   Hugo De Vries
4. D
   Lamarck

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1. A
   Both maternal & Paternal DNA
2. B
   Paternal DNA only
3. C
   Neither maternal nor paternal DNA.
4. D
   Maternal DNA only

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1. A
   Chromosomes
2. B
   Multiples
3. C
   Loci
4. D
   Alleles

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1. A
   Cricket
2. B
   Lizard
3. C
   Bee
4. D
   Ant

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1. A
   round and green
2. B
   wrinkled and yellow
3. C
   Wrinkled and yellow
4. D
   round and yellow

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1. A
   (i) and (ii) only
2. B
   (iii) and (iv) only
3. C
   (ii) and (iv) only
4. D
   (i) and (iii) only

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