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प्रश्न
If a genetic disease is transferred from a phenotypically normal but carrier female to only some of the male progeny, the disease is ______.
पर्याय
Sex-linked recessive
Autosomal dominant
Sex-linked dominant
Autosomal recessive
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उत्तर
If a genetic disease is transferred from a phenotypically normal but carrier female to only some of the male progeny, the disease is sex-linked recessive.
Explanation:
If a genetic disease is passed from a phenotypically normal but carrier female to only some of the male offspring, it indicates a sex-linked recessive inheritance. In such cases, females can be carriers without showing symptoms because they have two X chromosomes, and the defective gene is recessive. Males, having only one X chromosome, exhibit the disease if they inherit the affected X from the carrier mother, leading to the disease manifesting only in some of the male progeny. This pattern is typical for diseases like haemophilia and color blindness.
संबंधित 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
During a medical investigation, an infant was found to possess an extra chromosome 21. Describe the symptoms the child is likely to develop later in the life.
Identify the disease caused by an autosomal primary non-disjunction.
Choose the correct option which appropriately classifies the following disorders into Mendelian and chromosomal disorders:
Colour blindness, Down syndrome, Sickle cell anaemia, Turner syndrome, Thalassemia, Haemophilia, Phenylketonuria, Klinefelter syndrome.
HbA and HbS alleles of normal and sickle celled RBC are ______.
Thalassemia and sickle cell anemia are caused due to a problem in globin molecule synthesis. Select the correct statement.
Rajesh and Mahesh have defective haemoglobin due to genetic disorders. Rajesh has too few globin molecules while Mahesh has incorrectly functioning globin molecules. Identify the disorder they are suffering from.
| Rajesh | Mahesh | |
| A. | Sickle cell anaemia - an autosome linked recessive trait | Thalassemia - an autosome linked dominant trait |
| B. | Thalassemia - an autosome linked recessive blood disorder | Sickle cell anaemia - an autosome linked recessive trait |
| C. | Sickle cell anemia - an autosome linked recessive trait | Thalassemia - an autosome linked recessive blood disorder |
| D. | Thalassemia - an autosome linked recessive blood disorder | Sickle cell anaemia - an autosome linked dominant trait |
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?
The practice of analyzing inheritance patterns in human beings is called ______
Select the correct match.
