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प्रश्न
In which of the following disorders number of chromosomes present is 47?
(A) Turner’s syndrome
(B) Cushing’s syndrome
(C) Acquired Immuno - Deficiency Syndrome
(D) Down’s syndrome
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उत्तर
(D) Down’s syndrome
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संबंधित प्रश्न
Give any 'two' names of X-linked diseases
A colour-blind child is born to a normal couple. Work out a cross to show how it is possible. Mention the sex of this child.
Give an example of an autosomal recessive trait in humans. Explain its pattern of inheritance with the help of a cross.
Which of the following traits is never observed in a human female?
Match the column-I with column-II and re-write the matching pairs.
| Column-I | Column-II |
| 1. 21 trisomy | a. Turner’s syndrome |
| 2. X-monosomy | b. Klinefelter’s syndrome |
| 3. Holandric traits | c. Down's syndrome |
| 4. Feminized male | d. Hypertrichosis |
In human beings 45 chromosomes/single X/XO abnormality causes ______.
What is the reason for the 21st trisomy?
Match Column I with Column II and select the correct option:
| Column I | Column II | ||
| p. | Pleiotropy | I. | More than two alleles occur at the same locus on homologous chromosomes |
| q. | Multiple alleles | II. | Expression of both the alleles m heterozygous condition |
| r. | Polygenic | III. | Multiple effect of single gene |
| s. | Co-dominance | IV. | Single phenotypic character influenced by more than two genes |
Where are the genes for cytoplasmic male sterility in plants located?
Select the disease which is caused by recessive autosomal genes when present in homozygous conditions.
