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A man and a woman, each carries a mutant...

A man and a woman, each carries a mutant allele for phenylketoneuria, an inborn error of metabolism. Howerver, neither of them has this disease. The probability that their second child will suffer from phenylketoneuria is:

A

0.25

B

0.5

C

0.75

D

1

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The correct Answer is:
A
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A couple went to a doctor and reported that both of them are "carriers" for a particular disorder, their first child is suffering from that disorder and that they are expecting their second child. What is the probability that the new child would be affected by the same disorder?

Mark answer ( a) If the inference is "definitely true" i.e. it properly follows from the statement of facts given. Mark answer (b) If the inference is "probably true" though not "definitely true" in the light of the facts given. Mark answer (c) If the data is inadequate i.e. from the facts given, you cannot say whether the inference is likely to be true or false. Mark answer ( d) If the inference is "probably false" though not "definitely false" in the light of the fact given . Mark answer (e) If the inference is "definitely false" i.e., it can not possibly be drawn from the facts given or it contradicts the given facts. (Note: Each of the five questions has only one distinct answer i.e., no two questions can have the same answer. If you get the same answer for more than one question, consider both again and decide which one of the two would more definitely be that answer and in the same way review the others also). Cardiovascular disease is so prevalent that virtually all businesses are likely to have employees who suffer from, or may develop, this condition. Research shows that between 50-80 percent of all people who suffer a heart attack are able to return to work. However, this may not be possi ble if they have previously been involved in heavy physical work. In such cases, it may be possible to move the employee to lighter duties, with appropriate retraining where necessary. Similarly, high-pressure, stressful work, even where it does not involve physical activity, should also be avoided. Human Resource managers should be aware of the implications of job roles for employees with a cardiac condition. Employees who suffer from cardiovascular disease are mostly unable to return to work.

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Mark answer ( a) If the inference is "definitely true" i.e. it properly follows from the statement of facts given. Mark answer (b) If the inference is "probably true" though not "definitely true" in the light of the facts given. Mark answer (c) If the data is inadequate i.e. from the facts given, you cannot say whether the inference is likely to be true or false. Mark answer ( d) If the inference is "probably false" though not "definitely false" in the light of the fact given . Mark answer (e) If the inference is "definitely false" i.e., it can not possibly be drawn from the facts given or it contradicts the given facts. (Note: Each of the five questions has only one distinct answer i.e., no two questions can have the same answer. If you get the same answer for more than one question, consider both again and decide which one of the two would more definitely be that answer and in the same way review the others also). Cardiovascular disease is so prevalent that virtually all businesses are likely to have employees who suffer from, or may develop, this condition. Research shows that between 50-80 percent of all people who suffer a heart attack are able to return to work. However, this may not be possi ble if they have previously been involved in heavy physical work. In such cases, it may be possible to move the employee to lighter duties, with appropriate retraining where necessary. Similarly, high-pressure, stressful work, even where it does not involve physical activity, should also be avoided. Human Resource managers should be aware of the implications of job roles for employees with a cardiac condition. Employees above the age of 50 are found to suffer from cardiovascular disease.

Mark answer ( a) If the inference is "definitely true" i.e. it properly follows from the statement of facts given. Mark answer (b) If the inference is "probably true" though not "definitely true" in the light of the facts given. Mark answer (c) If the data is inadequate i.e. from the facts given, you cannot say whether the inference is likely to be true or false. Mark answer ( d) If the inference is "probably false" though not "definitely false" in the light of the fact given . Mark answer (e) If the inference is "definitely false" i.e., it can not possibly be drawn from the facts given or it contradicts the given facts. (Note: Each of the five questions has only one distinct answer i.e., no two questions can have the same answer. If you get the same answer for more than one question, consider both again and decide which one of the two would more definitely be that answer and in the same way review the others also). Cardiovascular disease is so prevalent that virtually all businesses are likely to have employees who suffer from, or may develop, this condition. Research shows that between 50-80 percent of all people who suffer a heart attack are able to return to work. However, this may not be possi ble if they have previously been involved in heavy physical work. In such cases, it may be possible to move the employee to lighter duties, with appropriate retraining where necessary. Similarly, high-pressure, stressful work, even where it does not involve physical activity, should also be avoided. Human Resource managers should be aware of the implications of job roles for employees with a cardiac condition. Heart disease can affect employees in any type of business

TRUEMAN BIOLOGY-PRINCIPLES OF INHERITANCE AND VARIATIONS -MCQs
  1. Match list-I with list-II and select the correct answer using the code...

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  2. Persons carrying the dominant gene(s) can taste a particular chemical ...

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  3. A man and a woman, each carries a mutant allele for phenylketoneuria, ...

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  4. Expression of a recessive phenotype in a deletion heterozygote is due ...

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  5. If two loci are 10 map units apart, assuming that no multiple cross-oe...

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  6. Identify the correct number of gametes, genotypes and phenotypes respe...

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  7. Natural selection can eliminate a deleterious allele, arising out of m...

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  8. In Mirabilis, red flowered plant crossed with white flowered one resul...

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  9. A female rat homozygous for a recessive X-linked mutation is mated to ...

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  10. Erythroblastosis foetalis is caused when

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  11. In Drosophilia the XXY condition leads to femaleness whereas in human ...

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  12. In Mendel might have studied 7 pairs of characters in a plant with 10 ...

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  13. First child of a normal pigmented couple is albino. The possibility of...

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  14. In a hospital, on the same day-5 children were born to different coupl...

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  15. If a plant with genotype R(1)R(2)R(0)R(0) produces potatoes of 240 gra...

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  16. How many chromosomes would you find in a somatic cell of a female with...

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  17. Slanting eyes, round face, mental retardation, epicanthus (eye folds) ...

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  18. In a random mating population of 1 lac individuals-the frequency of th...

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  19. In a random mating population of 1 lac individuals -75,000 individuals...

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  20. A male human is heterozygous for autosomal genes A and B and is also h...

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