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Heredity and Variation

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Questions

Question 1 Multiple Choice (Single Answer)

A woman has a rare abnormility of eyes, called ptosis. A single dominant gene P is responsible for it. The woman's father had ptosis, but her mother was normal. What is the probable genotype of the woman and her father?

  1. Woman = pp Father = Pp
  2. Woman = Pp Father = pp
  3. Woman = Pp Father= Pp
  4. Woman = pp Father = pp
Question 2 Multiple Choice (Single Answer)

Mule is a result of

  1. intraspecific hybridisation
  2. interspecific hybridisation
  3. double fertilisation
  4. environmental variation
Question 3 Multiple Choice (Single Answer)

How many contrasts were used by Mendel in his experiments?

  1. 2
  2. 5
  3. 6
  4. 7
Question 4 Multiple Choice (Single Answer)

What is the collection of clones having identical genetic make-up called?

  1. Remet
  2. Genet
  3. Twins
  4. Offspring
Question 5 Multiple Choice (Single Answer)

What is an allele?

  1. Functional unit of heredity
  2. A pair of contrasting characters
  3. Number of chromosomes in a haploid set
  4. Total number of chromosomes
Question 6 Multiple Choice (Single Answer)

Which of the following characters was not dominant in Mendel's experiments?

  1. Green pod colour
  2. Inflated pod shape
  3. Green cotyledon
  4. Tall stem
Question 7 Multiple Choice (Single Answer)

If a homozygous tall plant, which remained stunted due to lack of nutrition, is crossed with a short plant, then the ratio of phenotypes in F2 generation is

  1. all tall
  2. 50% tall and 50% short
  3. 75% tall and 25% short
  4. all short
Question 8 Multiple Choice (Single Answer)

What does phenotypic ratio of 9 : 3 : 3 : 1 prove?

  1. Linkage
  2. Dominance
  3. Segregation
  4. Independent assortment
Question 9 Multiple Choice (Single Answer)

ABO blood grouping is based on

  1. incomplete dominance and multiple alleles
  2. multiple alleles
  3. co-dominance and multiple allelism
  4. pleiotropic effect
Question 10 Multiple Choice (Single Answer)

Mendel used emasculation technique to carry out his experiments. Which part of a flower is removed in emasculation?

  1. Stigma
  2. Anthers
  3. Ovary
  4. Petals
Question 11 Multiple Choice (Single Answer)

If A is dominant gene and a is recessive gene and a cross produces 1 : 1 ratio of phenotypes in F1 generation, then the parental genotypes are

  1. Aa X Aa
  2. Aa X aa
  3. AA X aa
  4. AA X AA
Question 12 Multiple Choice (Single Answer)

Incomplete dominance 1 : 2 : 1 ratio is observed in

  1. back cross
  2. F2 generation
  3. F1 generation
  4. R cross
Question 13 Multiple Choice (Single Answer)

The genome of a sexually reproducing diploid contains

  1. one haploid set of chromosomes
  2. full set of chromosomes
  3. two diploid sets of chromosomes
  4. four sets of chromosomes
Question 14 Multiple Choice (Single Answer)

How many phenotypes are observed in F2 generation of dihybrid cross?

  1. 4
  2. 16
  3. 3
  4. 9
Question 15 Multiple Choice (Single Answer)

Which test is used to check the zygosity of an individual?

  1. Back cross
  2. Test cross
  3. Reciprocal cross
  4. Dihybrid cross
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