Pedigree analysis is very important in human | vedclass

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(D) 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 analys

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(D) 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 counseling to avoid disorders.$(ii)$ It shows the origin of a trait and the 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 color blindness,hemophilia,etc.The symbols used in pedigree analysis are as follows:| Symbol | Meaning || :--- | :--- || Square | Male || Circle | Female || Diamond | Sex unspecified || Shaded symbols | Affected individuals || Horizontal line between square and circle | Mating || Double horizontal line | Mating between relatives (consanguineous mating) || Vertical line from horizontal line | Parents above and children below (in order of birth-left to right) || Square with number $5$ inside | Five unaffected offspring |

Column-$I$	Column-$II$
$a.$ Solid symbol	$(i)$ Carrier of sex-linked trait
$b.$ Horizontal line between symbols	$(ii)$ Offspring
$c.$ Horizontal line above the symbols	$(iii)$ Affected individual (Trait to be studied)
$d.$ Dot in centre	$(iv)$ Mating (Parents)

Pedigree analysis is very important in human beings because

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