STANDARD Zoology Genetic Disorders MCQ Question with Solution

Sex linked disease is

A

Haemophilia

B

Colourblindness

C

Sickle-cell anaemia

D

Both (a) and (b)

Option D

Both Haemophilia and Colourblindness are X-linked recessive diseases, meaning they are carried on the X chromosome.

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Assertion : Phenylketonuria is a disease in which excretion of phenylalanine occurs in urine. Reason : It is due to dietary imbalance.

Which one of the following symbols and its representation, used in human pedigree analysis is correct

The human chromosome with the highest and least number of genes in them are respectively _______