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The initial clue about the genetic/chrom...

The initial clue about the genetic/chromosomal mechanism of sex determination can be traced back to some of the experiments carried out in

A

Human beings

B

Birds

C

Insects

D

Plants

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The correct Answer is:
C
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Morgan Experiment|Chromosomal Mapping|Sex Determination|OMR

In two different experiments, equilibrium A(g) hArr B(g) is established by initially taking reactant only. In first experiment, reaction is carried out in absence of catalyst and in second experiment reaction is carried out in presence of catalyst, then, which of the following curve of rate us time for forward and backward reaction hold true in these two experiments ?

Read the following statements. (i) In haplo-diploid sex-determination system, the males do not have father and thus cannot have sons, but have a grandfather and can have grandsons (ii) In honey bee, workers are developed by the unfertilized eggs by means of parthenogenesis In human skin colour, the effect of each allele is additive In XO type of sex-determination, male have half number of chromosome than the female Select the incorrect statements.

Statement-I: A circular metal hoop is suspended on the edge by a hook. The hoop can oscillate side to side in the plane of the hoop, or it can oscillate back and fourth in a direction perpendicular to the plane of the hoop. The time period of oscillation would be more when oscillations are carried out in the plane of the hoop. Statement-II : Time epriod of physical pendulum is more if moment of inertia of the rigid body about corresponding axis passing through the pivoted point is more.

Humans have sex determination mechanism that depends on X-chromosome. The key to sex determination in humans is the SRY located on X-chromosome.

A : Somatic hybrids may be used for the production of useful plants. R : Genetic manipulation can be carried out more rapidly when plant cells are in protoplast state.

Complete the following paragraph by selecting the option that correctly fils the blanks (i)- (iv) The kidney have built-in mechanisms for the regulation of glomerular filtration rate. One such efficient mechanism is carried out by (i)._____ It is a special sensitive region formed by cellular modifications in the (ii)._________ and the (iii)._________ at the location of their contact. A fall in GFR can activate the JG cells to release (iv).________ which can stimulate the glomerular blood flow the thereby brings GFR back to normal

Read the following statements. (i) Morgan carried out several monohybrid crosses in Drosophila to study genes that were sex-linked. (ii) Morgan attributed that proportion of parental gene combination is less than the non-parental type due to the physical association. Term recombination was coined by Morgon to describe the generation of non-parental gene combinations. Alfred Strutevent used the frequency of linkage between gene pairs on the same chromosome and fine genetic map. Select how many are incorrect statement(s).

AAKASH INSTITUTE-PRINCIPLES OF INHERITANCE AND VARIATION-Assignment (SECTION-A)
  1. Fruit flies are one of the best materials for genetic studies becaus...

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  2. Generation of non-parental gene combination is termed as

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  3. The initial clue about the genetic/chromosomal mechanism of sex determ...

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  4. In which of the sex determination both male and female same under ...

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  5. Two different types of gametes in terms of the sex chromosomes, ar...

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  6. Individuals having homomorphic sex-chromosomes produce

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  7. Which of the following phenomena leads to variation in DNA ?

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  8. Sickle cell-anaemia disorder arises due to

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  9. In pedigree analysis, symbol given for sex unspecified is

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  10. Cystic fibrosis, Myotonic dytrophy and Thalassemia are

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  11. Which of the following trait shows transmission from carries femal...

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  12. Phenylketonuria is an inborn error of metabolism that is inherited as

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  13. Which of the following abnormalities is due to autosomal dominant mu...

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  14. Absence or excess or abnormal arrangement of one or more chromosomes ...

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  15. Mark the odd one w.r.t syndrome which occurs due to failure of segreg...

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  16. Heterozygous round and yellow seeded pea plants were selfed and tota...

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  17. Which of the disorder is related with the Karyotype given below ?

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  18. Mark the correct match

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  19. Physical , psychromotor and mental development is retarded in an indi...

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  20. In which of the following disorder's affected individual's posses ...

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