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Q. No.The recombination frequency between the genes a & c is 5%, b & c is 15%, b & d is 9%, a & b is 20%, c & d is 24% and a & d is 29%. What will be the sequence of these genes on a linear chromosome?
1. a, c, b, d
2. a, d, b, c
3. d, b, a, c
4. a, b, c, d
1. a, c, b, d
2. a, d, b, c
3. d, b, a, c
4. a, b, c, d
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology1. 100%
2. 25%
3. 50%
4. 75%
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologySelect the correct statements with respect to pleiotropism
(a) A gene is said to be pleiotropy if it affects more than one trait
(b) Phenylketonuria is an example of pleiotropy
(c) A condition where one gene has several alleles is referred to as pleiotropism
(d) A trait is said to be pleiotropic if several genes control it
Choose the correct answer from the options given below:
1. (a) and (b) only
2. (a) and (d) only
3. (a), (b) and (c) only
4. (b) ,(c) and (d) only
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyGiven below are two statements: One is labelled as Assertion (A) and the other is labelled as Reason (R)
Assertion(A): A father will never pass the gene for haemophilia to his sons
Reason (R) : Haemophilia is sex-linked (X-linked recessive traits.
In the light of the above statements, choose the correct answer from the options given below
1. (A) is correct but R is not correct
2. (A) is not correct but (R) is correct
3. Both (A) and (R) are correct (R) is the correct explanation of (A)
4. Both (A) and (R) are correct but (R) is not the correct explanation of (A)
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyMatch List-I with List-II
| List-I | List-II |
| (a) Haemophilia | (i) Inborn error of metabolism which lacks an enzyme that converts phenylalanine into tyrosine |
| (b) Down's Syndrome | (ii) Sex-linked recessive disorder defect in blood coagulation |
| (c)Phenylketonuria | (iii) Presence of additional copy of X-chromosome (44+XXY) |
| (d) Klinefelter's Syndrome | (iv) Additional copy of chromosome number 21 |
Choose the correct answer from the options given below:
| (a) | (b) | (c) | (d) | |
| 1. | (ii) | (iv) | (i) | (iii) |
| 2. | (iv) | (ii) | (i) | (iii) |
| 3. | (ii) | (iii) | (i) | (iv) |
| 4 | (i) | (ii) | (iii) | (iv) |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyAssuming that fur colour of an animal is dark, range of colour shade and white. A cross is made between a male (AABBCC) with dark fur colour and a female (aabbcc) with white fur colour. What would be the fur colour of F1 generation?
1. All intermediate colour
2. Range of colour shade
3. All dark colour
4. All white colour
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyIn Drosophila, the genes for color of body and color of eyes are situated on _______.
1. both the sex chromosomes
2. autosomes
3. Y-chromosome
4. X-chromosome
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyA low frequency recombination indicates that the genes are:
1. Located far apart from each other
2. Located close to each other
3. Not linked
4. Present on different c
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyI. its four pairs of chromosomes
II. a very large number of visible as well as biochemically mutant phenotypes
III. easy and inexpensive maintenance
IV. short generation time and large number of offspring
1. II and III only
2. I, II, and III only
3. II, III, and IV only
4. I, II, III, and IV
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology1. The closer two genes are on a chromosome, the lower the probability that a crossover will occur between them.
2. The observed frequency of recombination of two genes that are far apart from each other has a maximum value of 100%.
3. All of the traits that Mendel studied–seed color, pod shape, flower color, and others–are due to genes linked on the same chromosome.
4. Linked genes are found on different chromosomes
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