Assertion   :       In honey bee, life history shows natural and complete parthenogenesis.

Reason      :       In honey bee, both drones and workers are parthenogenetically developed.

  1. If both the assertion and the reason are true and the reason is a correct explanation of the assertion
  2. If both the assertion and reason are true but the reason is not a correct explanation of the assertion
  3. If the assertion is true but the reason is false
  4. If both the assertion and reason are false

Subtopic:  Sex Determination |
 54%
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A plant, on repeated self pollination, preserves the trait expressed for many generations. Such a plant is said to be:

(1) Panmictic

(2) Homologous

(3) Apomictic                                                

(4) Pure line

Subtopic:  Monohybrid Cross: 1 |
 84%
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The F1 progeny in monohybrid crosses by Mendel resembled:

1. The parent exhibiting dominant trait completely

2. The parent exhibiting recessive trait completely

3. The parent exhibiting dominant trait partly

4. The parent exhibiting recessive trait partly

Subtopic:  Monohybrid Cross: 1 |
 82%
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In a true breeding the allelic pair of genes are

1. Homologous
2. Linked
3. Stable
4. Homozygous

Subtopic:  Monohybrid Cross: 1 |
 58%
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A test cross is done to find out:

(1) Fitness of an organism

(2) Genotype of a plant expressing dominant phenotype

(3) The suitable parents for a Mendelian Cross

(4) The hidden genotypic ratio of F2 phenotypes

Subtopic:  Monohybrid Cross: Further Understanding |
 82%
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What is the ratio of a typical monohybrid test cross?

(1) 2 : 1

(2) 3 : 1

(3) 1: 2 : 1                

(4) 1 : 1

Subtopic:  Monohybrid Cross: 1 |
 65%
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The law of Segregation is based on the fact that

1. The alleles do not show any blending

2. There is random fertilization

3. Gametes are pure for the trait

4. The zygotes are diploid

Subtopic:  Law of Segregation |
 82%
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The inheritance of flower colour in dog flower and 4’O clock plant exhibits:

1. Complete dominance

2. Incomplete dominance

3. Co-dominance

4. Lethality

Subtopic:  Dominance Deviation from Mendel: 1 |
 93%
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In complete dominance, the recessive allele with respect to the dominant allele:

1. Produces no product

2. Produces a different product

3. Produces half the product

4. Produces no product or a non-functional product

Subtopic:  Dominance Deviation from Mendel: 1 |
 66%
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The number of alleles, the genotypic combinations and phenotypes in ABO system is respectively:

(1) 3, 6 and 4

(2) 3, 4 and 6                            

(3) 2, 3 and 4            

(4) 2, 3, and 6

Subtopic:  Dominance Deviation from Mendel: 2 |
 84%
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