Why are pedgrees valuable to genetic counselors in discussing inheritance patter
ID: 167064 • Letter: W
Question
Why are pedgrees valuable to genetic counselors in discussing inheritance patterns with patients? Distinguish between the symbols for fraternal and identical twins. Consider the X-linked trait color blindness, If a man who is color-blind marries woman who is a carrier for color blindness, predict the genotype and phenotype for their offspring. Duchenne muscular dystrophy is a sex-linked trait characterized by muscle degeneration that leads to a loss of skeletal muscle control respiratory failure, and eventually death a man who does not have Duchenne muscular dystrophy marries a woman who is a carrier for the trait, predict the genotype and phenotype for their offspring. Achondroplasia, the most common type of human dwarfism, affects 1 in 15,000 to 1 in 40,000 individuals. Many cases of achondroplasia are the result of a spontaneous mutation. After the mutation occurs, however, it becomes an autosomal dominant trait. On a TV talk show, the audience was shocked to learn that two individuals with achondroplasia had a son of average height and two other sons and a daughter with achondroplasia. Draw a pedigree of the family, and explain how the parents can have a, child with "average" height. The following pedigree illustrates the inheritance of Tay-Sachs disease in four generations of a family. Interpret the pedigree and determine whether the trait is dominant or recessive. What happened in the third generation?Explanation / Answer
6.1. Pedigree analysis is important to know the possibility of a recessive alle which may create a disorder in the progeny.eg. Hemophilia.
It can indicate the origin of the trait of ancestor.e.g. Queen victoria fr hemophilia.
It can indicate useful or harmful marriges between close relative, will cause.
The analysis is use for genetic counselling about the possibilities of prospective parents transmitting a disorder to thier child.
The pedigree analysis is studies for inheritance of human trait because mendalian common experiment cannot be carried out in humans as humans are mixed trait and thier trait is affected by number of factor.
The pedigree analysis is done to wart off the possible disaster due to harmful genetic defect which can be easily explained to patient with help of pedigree symbols.
Related Questions
drjack9650@gmail.com
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.