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प्रश्न
Why are color-blindness and thalassaemia categorised as Mendelian disorders? Write the symptoms of these diseases seen in people suffering from them.
उत्तर
Thalassaemia and colour blindness are categorised as Mendelian disorders because these are determined by alternation or mutation in a single gene. Symptoms of thalassaemia: The main symptoms of thalassaemia are anaemia, jaundice, hepatosplenomegaly, cardiac enlargement and skeletal deformities Symptoms of colour blindness: The main symptom of colour blindness is the inability of certain human beings to distinguish red and green colour.
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संबंधित प्रश्न
Identify 'a', 'b', 'c',’d’, 'e' and 'f' in the table given below:
| No. | Syndrome | Cause | Characteristics of affected individuals | Sex Male/Female/Both |
| 1. | Down's | Trisomy of 21 | 'a' (i) (ii) |
'b' |
| 2. | 'c' | XXY | Overall masculine development. |
'd' |
| 3. | Turner's | 45 with XO | 'e' (i) (ii) |
'f' |
HbA and HbS alleles of normal and sickle celled RBC are ______.
Conditions of a karyotype 2n ± 1 and 2n ± 2 are called ______.
Sickel-cell anaemia is an example of ______.
The most striking example of point mutation is found in a disease called ______.
A person with 47 chromosomes due to an additional Y-chromosome suffers from a condition called ______.
Read the following and answer from given below:
Turner's syndrome is an example of monosomy. It is formed by the union of an allosome-free egg and a normal 'X' containing sperm or a normal egg and an allosome-free sperm. The individual has 2n = 45 chromosomes (44 + X0) instead of 46. Such individuals are sterile females who have rudimentary ovaries, underdeveloped breasts, small uterus, short stature, webbed neck, and abnormal intelligence. They may not menstruate or ovulate. This disorder can be treated by giving female sex hormones to women from the age of puberty to make them develop breasts and have menstruation. This makes them feel more normal.
Which of the following statements regarding Turner's syndrome is incorrect?
“Genes contain the information that is required to express a particular trait.” Explain.
Which of the folowing is a correct match?
What are chromosomal disorders?
