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प्रश्न
Write the scientific name of the fruit-fly. Why did Morgan prefer to work with fruit-flies for his experiments? State any three reasons.
उत्तर
The scientific name of fruit fly is Drosophila melanogaster. Morgan preferred to work with fruit fly for his experiments because
(i) It is simple and convenient to breed under laboratory conditions throughout the year.
(ii) Its generation time is only 10–12 days.
(iii) It breeds quickly and prolifically and so produces large progeny after each mating.
(iv) Its contrasting features are easily observable.
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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?
Mention any two autosomal genetic disorders with their symptoms.
What is ‘syndrome’?
Identify the INCORRECT statement.
Identify the option that correctly represents the number of chromosomes in Down syndrome.
Conditions of a karyotype 2n ± 1 and 2n ± 2 are called ______.
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.
Turner's syndrome is an example of ______
The practice of analyzing inheritance patterns in human beings is called ______
Select the correct match.
Give the genotype of Klinefelter's syndrome.
