Pick out the correct statements: (i) Colour blindness is a sex-linked recessive gene disorder (ii) Klinefelter's syndrome is 18 th chromosomal trisomy (iii) Phenylketonuria is an autosomal dominant gene disorder. (iv) Down’s syndrome is due to aneuploidy

Question

Pick out the correct statements: (i) Colour blindness is a sex-linked recessive gene disorder (ii) Klinefelter's syndrome is 18 th chromosomal trisomy (iii) Phenylketonuria is an autosomal dominant gene disorder. (iv) Down’s syndrome is due to aneuploidy, i ,ii, and iii are correct, i and ii are correct, ii,iii,and iv are correct, i,ii,and iv are correct

MARKS App · Accepted Answer

Colour blindness is usually a genetic condition. Red/green and blue colour blindness is usually passed down from parents to offsprings. The gene which is responsible for the condition is carried on the X chromosome. Edward syndrome is a genetic disorder caused by the presence of all or part of an extra 18th chromosome. The majority of people with the syndrome die during the fetal stage; infants who survive experience serious defects and commonly live for short periods of time Aneuploidy is the presence of an abnormal number of chromosomes in a cell, for example, a human cell having 45 or 47 chromosomes instead of the usual 46. Down’s syndrome is due to aneuploidy with 47 chromosomes. Phenylketonuria is an autosomal recessive gene disorder.

Search any question & find its solution

Looking for more such questions to practice?