20. Which of the following statements regarding human genetic disorders is accurate? A. Nondisjunction is responsible for causin
g Huntington's disease. B. Disorders in individual genes can cause disease or provide individuals with a genetic advantage. C. Disorders in individual genes are responsible for Down's syndrome. D. Nondisjunction can lead to an incorrect number of sex chromosomes.
The correct option is B. An alteration in an individual's gene may either be beneficial or detrimental. If the alteration in the gene sequence confers a genetic advantage on the individual then the alteration is beneficial but it the alteration confers a genetic disadvantage on the individual, then the alteration is detrimental.
Do you know , human eye and octopus eye are example of convergent evolution ! origin of both are different way but both works the same way, function of both are same !
Compare the limbs of different organisms goes in left box. compares fossilized structures to living organisms left box. other 2 go in the right box hope this helped(:
