1 : In the F2 generation of a Mendelian dihybrid cross the number of phenotypes and genotypes are --------
Options:
  1. phenotypes-4, genotypes-16
  2. phenotypes-9,genotypes-4
  3. phenotypes-4,genotypes-9
  4. phenotypes-4,genotypes-8

Answer: Option 3

Explanation:

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2 : In pigeons females have which type of genetic composition?
Options:
  1. homogametic
  2. heterogametic
  3. both of the above
  4. partially homogametic and partially heterogametic

Answer: Option 2

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3 : If father is colour blind and mother is carrier for colour blindness,the probability of the child being colour blind is -----
Options:
  1. 25%
  2. 100%
  3. 50%
  4. 0%

Answer: Option 3

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4 : How many types of gametes can be produced by a diploid organism who is heterozygous for 4 loci?
Options:
  1. 4
  2. 8
  3. 32
  4. 16

Answer: Option 4

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5 : Name the one which will not result in variations among siblings?
Options:
  1. crossing over
  2. mutation
  3. linkage
  4. none of the above

Answer: Option 3

Explanation:

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6 : ZZ/ZW type of sex determination is seen in -------
Options:
  1. platypus
  2. snail
  3. peacock
  4. cockroach

Answer: Option 3

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7 : A couple has 7 daughters.What is the possibility of their having a girl next time?
Options:
  1. 10%
  2. 90%
  3. 50%
  4. 20%

Answer: Option 3

Explanation:

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8 : If A= normal allele ,a=albino allele,then chances of this couple's fifth child being an albino?
Options:
  1. 1 in 1
  2. 1 in 2
  3. 1 in 4
  4. all of the above

Answer: Option 3

Explanation:

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9 : Which of the following trait is controlled by dominant autosomal genes?
Options:
  1. PTC(phenylthiocarbamide)tasting
  2. Polydactility
  3. Hungtington's chorea
  4. all of the above

Answer: Option 4

Explanation:

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10 : Failure of segregation of chromtids during cell division results in the gain or loss of chromosomes,called as ------
Options:
  1. euploidy
  2. monoploidy
  3. aneuploidy
  4. polyploidy

Answer: Option 3

Explanation:

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