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प्रश्न
Give the importance of heterocyst in cyanobateria.
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उत्तर
In cyanobacteria, heterocyst is specialized and colourless cells and are the site for nitrogen fixation.
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संबंधित प्रश्न
Give any 'two' names of X-linked diseases
Identify ‘a’, ‘b’, ‘c’, ‘d’, ‘e’ and ‘f’ in the table given below:
| S. No. | Syndrome | Cause | Characteristics of affected individuals | Sex (male/female/both) |
| 1. | Down’s | Trisomy of 21 |
‘a’ |
‘b’ |
| 2. | ‘c’ | XXY | Overall masculine development | ‘d’ |
| 3. | Turner’s | 45 with XO |
‘e’ |
‘f’ |
What is ‘syndrome’?
Klinefelters’ syndrome is characterised by a karyotype of ______.
Rajesh and Mahesh have defective haemoglobin due to genetic disorders. Rajesh has too few globin molecules while Mahesh has incorrectly functioning globin molecules. Identify the disorder they are suffering from.
| Rajesh | Mahesh | |
| A. | Sickle cell anaemia - an autosome linked recessive trait | Thalassemia - an autosome linked dominant trait |
| B. | Thalassemia - an autosome linked recessive blood disorder | Sickle cell anaemia - an autosome linked recessive trait |
| C. | Sickle cell anemia - an autosome linked recessive trait | Thalassemia - an autosome linked recessive blood disorder |
| D. | Thalassemia - an autosome linked recessive blood disorder | Sickle cell anaemia - an autosome linked dominant trait |
The practice of analyzing inheritance patterns in human beings is called ______
The technique exployed in human genetic counselling is:
Why is the frequency of red-green colour blindness is many times higher in males than that in females?
Give definition of non-disjunction.
What is the genotype of Turner's Syndrome?
