Pedigree analysis is very important in human beings because

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4.Principles of Inheritance and Variation

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Pedigree analysis is very important in human beings because

It helps genetic counselers to avoid disorders

It shows origin of traits

It shows the flow of traits in family

All of the above

Solution

The study of inheritance of genetic traits in several generations of a human family in the form of a family tree diagram is called pedigree analysis.

Advantages

$(i)$ It helps in genetic counselling to avoid disorders

$(ii)$ It shows the origin of a trait and flow of a trait in a family

$(iii)$ It is important to know the possibility of a recessive allele that can cause genetic disorders like colour blindness, haemophilia, etc. Signosed in the pedigree are

Standard 12

Biology

Which of the following is a genetic disease

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(AIPMT-1990)

Pick out the correct statements.

$I.$ Haemophilia is a sex-linked recessive disease

$II.$ Down's syndrome is due to aneuploidy

$III.$ Phenylketonuria is an autosomal dominant gene disorder

$IV.$ Phenylketonuria is an autosomal recessive gene disorder

$V.$ Sickle cell anaemia is an $X$-linked recessive gene disorder

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Sickle cell anaemia is due to

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(AIPMT-1990)

If a man who is colour blind marries a women, who is pure normal for colour vision, the chances of their sons have colour blindness is

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Given below is pedigree chart showing the inheritance of a certain trait in human. Select the correct option for the given chart

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Pedigree analysis is very important in human beings because

Solution

Similar Questions

Which of the following is a genetic disease

Sickle cell anaemia is due to

If a man who is colour blind marries a women, who is pure normal for colour vision, the chances of their sons have colour blindness is

Given below is pedigree chart showing the inheritance of a certain trait in human. Select the correct option for the given chart

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