Sex Linked Inheritance MCQ Basic Level

Sex Linked Inheritance MCQ Basic Level

Dear Readers,

Zoology is considered to be one of the scoring section. If prepared thoroughly, Zoology can help students to secure a meritorious position in the exam. These questions are very important in achieving your success in Exams after 12th.

Q1. If a normal woman marries a colourblind man, their

•  All son will be colourblind and daughters normal
•  All daughters will be colourblind and sons normal
•  All children will be normal
•  All children will be colourblind

All children will be normal

Q2. A haemophilic man marries a normal homozygous woman. What will be the probability of his sons to be haemophilic

•  0%
•  25%
•  100%
•  50%

0%

Q3. The genes, which are confined to differential region of Y chromosome only, are called

•  Mutant
•  Autosomal
•  Holandric
•  Completely sex-linked

Holandric

Q4. Usually the recessive character is expressed only when present in a double recessive condition. However, a single recessive gene can express itself in human beings when the gene is present on

•  Any autosome
•  X chromosome of female
•  X chromosome of male
•  Either on autosome or X chromosome

X chromosome of male

Q5. If a character is always transmitted directly from a father to all his sons and from their sons to all their sons, then which chromosome carries the gene for the character

•  Autosomes
•  X chromosome
•  Y chromosomes
•  None of the above

Y chromosomes

Q6. A colurblind daughter is born when

•  Father is colourblind, mother is normal
•  Mother is colourblind, father is normal
•  Mother is carrier, father is normal
•  Mother is carrier, father is colourblind

Mother is carrier, father is colourblind

Q7. Which disease is genetically linked

•  Haemophilia
•  Dysentery
•  Plague
•  Tuberculosis

Haemophilia

Q8. Genes for colour blindness in man are located on

•  X chromosome only
•  Y chromosome only
•  Either X or Y chromosome
•  Both X and Y chromosome

X chromosome only

Q9. If a colour blind lady marries a normal man, their children will be

•  Normal daughters and normal sons
•  Normal sons and carrier daughters
•  Colour blind sons and carrier daughters
•  Colour blind sons and colour blind daughters

Colour blind sons and carrier daughters

Q10. Which one is hereditary trait

•  Night blindness
•  Baldness
•  Colour blindness
•  Beri-beri

Colour blindness