(6) A family has four boys and has opted to try one more time for a daughter. A
ID: 171834 • Letter: #
Question
(6) A family has four boys and has opted to try one more time for a daughter. A friend of the family has told them that since they have had so many boys already that there would be only a 1/16 (0.5x0.5x0.5x0.5) chance of having a boy again but a 15/16 chance of having a daughter now. Is this a reasonable or correct assessment? Please provide your own analysis of this situation.
(7) A family pedigree for a trait shows a fatal disorder cropping up in members of a family in both sexes and in every generation, but, surprisingly, it also shows that unrelated husbands and wives marrying into this family are also equally prone to dying of this disorder. What are 2 possible interpretations of this observation concerning the origins and etiology of this deadly disorder?
(8) What is the probability that the offspring of a homozygous dominant individual and a homozygous recessive individual will exhibit the dominant phenotype? Explain your answer.
(9) What is Huntington’s disease? How is it inherited? Why do you suppose that the longer the CAG repeat mutation is in the diseases gene, the more severe the disease and the earlier the onset of the disease?
(10) In a well-constructed short paragraph, discuss some of the legal and ethical issues surrounding genetic testing and other modern human genetic advances.
Explanation / Answer
6. there are 50% chances that the child will be a girl or a boy.The chances that the child will be a girl or a boy is independent of the gender of the previous children in the family.The gender of the child is decided by the presence of fathers sperm.The fathers sperm can be either X or Y.If the sperm with X chromosome is fertikized with the egg,it will redult in a girl.And if the sperm with Y chromosome is fertilized with the egg ,it will result in in a boy.
7.The two interpretations concerning the disorder can be: The disorder is not X linked as both the males and females are affected by it.
Secondly,it can be an envirnonmental issue as even the unrelated people are getting affeced by it.So,it might not be an genetic disorder, but an envirnonmental condition.
8. There is a 50% chance that the offspring of homozygous recessive and hmozygous dominant individuals will exhibit dominant phenotype.
9.Huntington's disease is an inherited disorder that causes brain cell death.It is caused by an mutation in the either of the parents two copies of Huntington gene.The huntington gene is responsible for the expression of huntington protein.Huntington disease is inherited by a person from his/her parents.
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.