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Pedigree Analysis

is a tabular ...

Question

_________ is a tabular representation of inheritance of a particular disease or trait among the individuals of many generations of a family.

A

Evolutionary tree

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B

Family tree

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C

Pedigree chart

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D

Punnet square

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Solution

The correct option is C
Pedigree chart

Pedigree Analysis is a tabular representation of a family history by taking a particular disease or character into consideration. Punnet square is a diagram consisting of squares which is used to predict the genotype and phenotype of a cross or breeding experiment. Family tree is a diagram representing the members of a family across generations and their relationship with each other. Evolutionary tree is a diagram showing the evolutionary relationship between different organisms.

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_________ is a diagrammatic representation of inheritance of a particular disease or trait among the individuals of many generations of a family.

Q. A diagrammatic representational analysis of inheritance of a particular trait across the generations of a family is called analysis.

Q. A pedigree chart of a family with an autosomal recessive disease Z is given. Assume that inheritance is Mendelian, and that all individuals with homozygous recessive genotype have the disease. Circles in the pedigree represent females and squares represent males. Filled shapes indicate affected individuals, while unfilled shapes indicate unaffected individuals. If J does not have the recessive allele, the probability that I is a 'carrier of disease Z' is?

Q. A family consists of two parents and their five children and the pedigree chart below shows the inheritance of the trait colour blindness in them. [5 MARKS]

(a) Who is colour blind in the parents - Father or Mother?
(b) How many daughters and how many sons have been born in the family?
(c) What does the child 1 indicate about this trait?
(d) On which chromosome is the gene of this trait located?
(e) Name one other trait in humans which follows the similar pattern of inheritance.

Q. Two pedigrees (P and Q) are given, Individual-

1

F_{0}

generation of pedigree Q is not a carrier of the trait. Circles in the pedigree represent females and squares represent males. Filled shapes indicate affected individuals while unfilled shapes indicate unaffected individuals.
Assuming Mendelian inheritance and complete penetrance of the traits, choose the correct statement(s) from the following.

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