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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

Birds

B

Fishes

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).

NEET MAJOR TEST (COACHING)-MAJOR TEST 1-BIOLOGY
  1. How many of following are the examples of codominance :- (A) AB bloo...

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  2. Multiple alleles :-

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

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  4. Select the correct statements with respect to sexdetermination in chic...

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  5. How much linkage strength is present between two genes A & B, which ar...

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  6. There will be no Barr body in female suffereing from :-

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  7. If the gene frequency for PTC nontasters is 0.4, then what will be the...

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  8. Match the following column correctly : {:("Column-I"," Column-II"),(...

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  9. The specific DNA sequence where EcoRI cuts is

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  10. If gene of interest was inserted at PvuI site in pBR322 the resulting ...

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  11. Select the true statements from the following regarding insulin – (A...

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  12. The genetic defect-adenosine deaminase (ADA) deficiency may be cured p...

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  13. Carotenoids and anthocyanin pigments are examples of :-

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  14. Cellulose is a polymer of :-

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  15. Cytidine is :-

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  16. Which of the following option is incorrect with reference to the trans...

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  17. 5' rarr 3' Exonuclease activity is found in :-

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  18. If base sequence in m-RNA is 5' UAC GUA CGU ACG UAC GUA CGU ACG 3' the...

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  19. Which of the following m-RNA is translated completely :- (A) 5' AUG ...

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  20. The main steps of plant breeding programmes is given below (A) Cross...

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