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प्रश्न
Give reasons for the development of Turner’s syndrome and also mention its symptoms.
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उत्तर
Turner Syndrome (X monosomy/XO females):
- It is a sex chromosomal disorder caused due to non-disjunction of chromosomes during gamete formation.
- Individual born with Turner syndrome has 44 autosomes with XO.
- They are phenotypically female. They have short stature (height) and webbed neck, lower posterior hair line, broad shield-shaped chest, poorly developed ovaries and breast, and low intelligence.
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संबंधित प्रश्न
Why is pedigree analysis done in the study of human genetics? State the conclusions that can be drawn from it.
Identify the disease caused by an autosomal primary non-disjunction.
In Klinefelter syndrome, an extra chromosome is a result of non-disjunction of X-chromosome during ____________.
Trisomy is represented by ______.
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?
If a father and son are both defective in red-green colour vision, is it likely that the son inherited the trait from his father? Comment.
It is said, that the harmful alleles get eliminated from population over a period of time, yet sickle cell anaemia is persisting in human population. Why?
Mention any one symptom of Turner's syndrome.
What are chromosomal disorders?
Describe Turner's syndrome.
