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प्रश्न
What is the reason for the 21st trisomy?
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उत्तर
21st Trisomy occurs due to non-disjunction or failure of separation of chromosomes (autosomes) during gamete formation.
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संबंधित प्रश्न
What will be the phenotype of progeny, if a carrier haemophilic female marries a normal male?
Mention any two autosomal genetic disorders with their symptoms.
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
Very Short Answer Question.
Give an example of a chromosomal disorder caused due to nondisjunction of autosomes.
What are the different characters that develop due to Klinefelter's syndrome?
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 |
Conditions of a karyotype 2n ± 1 and 2n ± 2 are called ______.
If a genetic disease is transferred from a phenotypically normal but carrier female to only some of the male progeny, the disease is ______.
Where are the genes for cytoplasmic male sterility in plants located?
Short stature in females, webbed neck absence of menstrual cycle and sterility are characteristics which of the following disease?
