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Down's syndrome is caused by an extra co...

Down's syndrome is caused by an extra copy of chromosome number 21. What percentage of offspring produced by an affected mother and a normal father would be affected by this disorder

A

0.25

B

1

C

0.75

D

0.5

Text Solution

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The correct Answer is:
D
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Down syndrome is caused by an extra copy of chromosome number 21. What percentage of offspring prodused by an affected mother and a normal father would be affected by this disorder?

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Read the following text and answer the following questions on the basis of the same: Down syndrome (sometimes called Down's syndrome) is a condition in which a child is born with an extra copy of their 21st chromosome hence its other name, trisomy 21. The affected individual mental retarded, short statured with small round, head, furrowed tongue and partially open mouth, Physical, psychomotor and mental development is retarded. Down Syndrome is an extra copy which chromosome

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Read the following text and answer the following questions on the basis of the same: Down syndrome (sometimes called Down's syndrome) is a condition in which a child is born with an extra copy of their 21st chromosome hence its other name, trisomy 21. The affected individual mental retarded, short statured with small round, head, furrowed tongue and partially open mouth, Physical, psychomotor and mental development is retarded. Down syndrome is caused due to

Read the following text and answer the following questions on the basis of the same: Down syndrome (sometimes called Down's syndrome) is a condition in which a child is born with an extra copy of their 21st chromosome hence its other name, trisomy 21. The affected individual mental retarded, short statured with small round, head, furrowed tongue and partially open mouth, Physical, psychomotor and mental development is retarded. Down syndrome is

Read the following text and answer the following questions on the basis of the same: Down syndrome (sometimes called Down's syndrome) is a condition in which a child is born with an extra copy of their 21st chromosome hence its other name, trisomy 21. The affected individual mental retarded, short statured with small round, head, furrowed tongue and partially open mouth, Physical, psychomotor and mental development is retarded. One of this trait is seen in a person with Down syndrome

In Down syndrome , karyotyping has shown that the disoeder is associated with trisomy of chromosome number 21 usually due to:

ERRORLESS -PRINCIPLES OF INHERITANCE AND VARIATION-Principles Of Inheritance And Variation
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  3. Down's syndrome is caused by an extra copy of chromosome number 21. Wh...

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  4. Polyploidy can be induced the application of

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  5. Given below is the representation of kind of chromosomal mutation what...

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  6. In the given human hand pedigree which character is represented and wh...

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  7. A recessive mutant is one which is:

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  8. Frequency of Down's syndrome increase when the matermal age is

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  10. Change in the number of body parts is called

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  11. Turner's syndrome is an example of

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  13. The "cri-du-chat" syndrome is caused by change in chromosome structure...

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  14. Somaclonal variation appears in plants

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  17. Which of the following corresponds to mutagens

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  18. Both sicke cell anaemia and Huntington's chorea are

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  20. Failure of segregation of chromatids during cell division results in t...

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