Sex Linked Inheritance MCQ Advance Level

Sex Linked Inheritance MCQ Advance 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. A diseased man marries a normal woman. They get three daughters and five sons. All the daughters were diseased and sons were normal. the gene of this disease is

•  Autosomal dominant
•  Sex linked recessive
•  Sex limited character
•  Sex linked dominant

Sex linked dominant

Q2. Mental retardation in man, associated with sex chromosomal abnormality is usually due to

•  Reduction in X complement
•  Increase in X complement
•  Moderate increase in Y complement
•  Large increase in Y complement

Increase in X complement

Q3. Pattern baldness, moustaches and beard in human males are examples of

•  Sex-determining traits
•  Sex-linked traits
•  Sex limited traits
•  Sex differentiating traits

Sex limited traits

Q4. A child receives

•  25% genes form his father
•  50% genes form his father
•  75% genes form his father
•  100% genes from his father

50% genes form his father

Q5. A husband and wife have normal vision but fathers of both of them were colour blind. Probability of their first daughter to be colour blind

•  25%
•  50%
•  75%
•  0%

0%

Q6. One way of determining sex-linked inheritance is

•  Sons resemble mother and daughter resemble father
•  Both sons and daughter resemble father
•  Sons resemble father and daughter resemble mother
•  Both sons and daughters resemble mother

Sons resemble mother and daughter resemble father

Q7. What are all the chances of colour blind daughter and sons being born in a marriage of normal man marrying a normal woman, whose father was colour blind

•  All sons are normal and all daughters are colourblind
•  Both the sons and daughters are colourblind
•  All the sons are colurblind and all daughters are normal
•  50% sons are colourblind and all daughters are phenotypically normal

50% sons are colourblind and all daughters are phenotypically normal

Q8. Colour blindness is found more in males than in females because

•  The males containing the single affected X chromosome are colour blind
•  Heterozygous females are colour blind
•  Males having affected Y chromosome are colour blind
•  Affected X chromosome has much high affinity to Y chromosome as compared to unaffected X chromosome

The males containing the single affected X chromosome are colour blind

Q9. A man homozygous for brown colour marries a lady heterozygous for brown colour dominant. What will be the fate of their children

•  All brown
•  Three brown
•  Two brown
•  None of the above

All brown

Q10. A fruit fly is heterozygous for sex-linked genes when meted with normal female fruit fly, the males specific chromosome will enter egg cell in the proportion

•  1 : 1
•  2 : 1
•  3 : 1
•  7 : 1

1 : 1