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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 ______.
विकल्प
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
Given below is the representation of amino acid composition not the relevant translated portion of β-chain of haemoglobin, related to the shape of human red blood cells
(a) Is this representation indicating a normal human or a sufferer from certain related genetic disease? Give reason in support of your answer.
(b) What difference would be noticed in the phenotype of the normal and the sufferer related to this gene?
(c) Who are likely to suffer more from the defect related to the gene represented the males, the females or both males and females equally? And why?
A couple with normal vision bear a colour blind child. Work out a cross to show how it is possible and mention the sex of the affected child.
Why is pedigree analysis done in the study of human genetics? State the conclusions that can be drawn from it.
Give the importance of heterocyst in cyanobateria.
Klinefelters’ syndrome is characterised by a karyotype of ______.
Placed below is a karyotype of a human being.
On the basis of this karyotype, which of the following conclusions can be drawn: ______
Read the following and answer from given below:
Turner's syndrome is an example of monosomy. It is formed by the union of an allosome-free egg and a normal 'X' containing sperm or a normal egg and an allosome-free sperm. The individual has 2n = 45 chromosomes (44 + X0) instead of 46. Such individuals are sterile females who have rudimentary ovaries, underdeveloped breasts, small uterus, short stature, webbed neck, and abnormal intelligence. They may not menstruate or ovulate. This disorder can be treated by giving female sex hormones to women from the age of puberty to make them develop breasts and have menstruation. This makes them feel more normal.
The number of Barr bodies present in a female with Turner's syndrome is ______
“Genes contain the information that is required to express a particular trait.” Explain.
Describe Klinefelter’s syndrome.
Jacob is genetically a carrier of the disorder that affects the shape of the RBCs, as shown in the diagram below. His son James suffers from the same disorder.
- Give the biochemical reason for the disorder that changes the shape of the RBCs, as shown above.
- Draw a Punnett square to show the genotype of the mother of James.
- Name and define the type of 'point mutation' responsible for this disorder.
