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प्रश्न
Why is the frequency of red-green colour blindness is many times higher in males than that in females?
उत्तर
For becoming colourblind, the female must have the allele for it in both her X-chromosomes; but males develop colourblindness when their sole x-chromosome has the allele for it.
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संबंधित प्रश्न
Give an example of a human disorder that is caused due to a single gene mutation.
Mention any two autosomal genetic disorders with their symptoms.
Name a disorder a human suffers from as a result of the monosomy of the sex chromosome. Give the karyotype and write the symptoms.
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 |
Identify the disease caused by an autosomal primary non-disjunction.
Thalassemia and sickle cell anemia are caused due to a problem in globin molecule synthesis. Select the correct statement.
A disease caused by an autosomal primary non-disjunction is ______.
Select the disease which is caused by recessive autosomal genes when present in homozygous conditions.
This abnormality occurs due to monosomy (2n - 1); the individual has 2n = 45 chromosomes with 44 + XO genotype.
Give the genotype of Klinefelter's syndrome.
