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Question
The pedigree chart given below shows a particular trait which is absent in parents but present in the next generatoin irrespective of sexes. Draw your conclusion on the basis of the pedigree.
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Solution
The trait is autosome linked and recessive in nature. Both the parents are carrier (i.e., heterozygous) hence among offspring few show the trait irrespective of sex. The other offsprings are either normal or carrier.
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RELATED QUESTIONS
Study the Pedigree chart given below and answer the questions that follow:
Symbols used in the given Pedigree Chart are as follows:
 |
Carrier male |
 |
Affected male |
 |
Normal male |
 |
Carrier female |
 |
Affected female |
 |
Normal female |
(a) On the basis of the inheritance pattern exhibited in this pedigree chart, what conclusion can you draw about the pattern of inheritance?
(b) If the female is homozygous for the affected trait in this pedigree chart, then what percentage of her sons will be affected?
(c) Give the genotype of offspring 1, 2, 3 and 4 in III generations.
OR
(c) In this type of inheritance pattern, out of male and female children which one has less probability of receiving the trait from the parents? Give a reason.
With the help of given pedigree, find out the probability for the birth of a child having no disease and being a carrier (has the disease mutation in one allele of the gene) in F3 generation.
Which one of the following symbols represents mating between relatives in human pedigree analysis?
What is the term used to describe the individual from whom a pedigree study begins?
Why is controlled crossing not possible in human pedigree studies?
What symbol is used to represent an individual of unspecified sex in a pedigree chart?
How are affected individuals typically represented in a pedigree chart?
How are known carriers of a trait represented in a pedigree chart?
What does a double horizontal line between two symbols in a pedigree chart represent?
What is the fifth and final step in the process of drawing a pedigree chart?
What is the purpose of pedigree analysis in medical applications?
Why is the small family size of humans considered a limitation for pedigree analysis?
What symbol represents the death of an individual in a pedigree chart?
What symbol represents dizygotic twins in a pedigree chart?
