Advertisements
Advertisements
प्रश्न
What are the different characters that develop due to Klinefelter's syndrome?
Advertisements
उत्तर
Klinefelter syndrome (XXY males):
- It is a chromosomal disorder caused due to an extra X chromosome in males. Thus genotype of individuals is 44 + XXY. They are described as feminized males.
- The extra chromosome is a result of the non-disjunction of the X-chromosome during meiosis.
- The individual is male and has overall masculine development.
- Individuals have harsh voice pitch and under developed testis.
- They are tall with long arms, feminine development (development of breast i.e. Gynaecomastia), and spermatogenesis does not occur, therefore, individuals are sterile.
APPEARS IN
संबंधित प्रश्न
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 |
If a genetic disease is transferred from a phenotypically normal but carrier female to only some of the male progeny, the disease is ______.
Sickel-cell anaemia is an example of ______.
Read the following and answer from given below:
According to Mendel, one gene controls the expression of one character only. The ability of a gene to have multiple phenotypic effects because it influences a number of characters are an exception. The gene has multiple phenotypic effects because its ability to control two or more characters can be seen in cotton. In cotton, a gene for the lint also influences the height of the plant, size of the ball, number of ovules, and viability of seeds.
Which of the following disorder is an example of genes with multiple phenotypic effects?
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?
Give the genotype of Klinefelter’s syndrome.
Describe Turner's syndrome.
How many pairs of autosomes are present in the human karyotype?
At what level does the defect occur in Mendelian disorders?
