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प्रश्न
If only one 'X' chromosome is found in a female person, which of the following symptoms she will show?
- epicanthal skin fold
- webbing of neck
- small testis and absence of spermatogenesis
- presence of simian crease on the palm
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उत्तर
(b) Webbing of neck
A missing X chromosome leads to Turner’s syndrome. The symptoms in females are a receding lower jaw and a short webbed neck.
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संबंधित प्रश्न
Name a disorder a human suffers from as a result of the monosomy of the sex chromosome. Give the karyotype and write the symptoms.
Very Short Answer Question.
Give an example of a chromosomal disorder caused due to nondisjunction of autosomes.
Mention the symptoms of Phenylketonuria.
Identify the option that correctly represents the number of chromosomes in Down syndrome.
In sickle cell anaemia glutamic acid is replaced by valine. Which one of the following triplets codes for valine?
Genes for cytoplasmic male sterility in plants are generally located in ______.
If both parents are carriers for thalassaemia, which is an autosomal recessive disorder, what are the chances of pregnancy resulting in an affected child?
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?
Jacob is genetically a carrier of the disorder that affects the shape of the RBCs, as shown in the diagram below. His son James suffers from the same disorder.
- Give the biochemical reason for the disorder that changes the shape of the RBCs, as shown above.
- Draw a Punnett square to show the genotype of the mother of James.
- Name and define the type of 'point mutation' responsible for this disorder.
Match the disorder in column I with their nature in column II.
| Column I | Column II | ||
| i. | Thalassemia | a. | X monosomy |
| ii. | Turner’s syndrome | b. | Extra X chromosomes in male |
| iii. | Klinefelter’s syndrome | c. | 21st Trisomy |
| iv. | Down’s syndrome | d. | Mendelian disorder |
