Principles of Inheritance and Variation Test

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Principles of Inheritance and Variation Test - 16

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Weekly Quiz Competition

Question 1
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A man and a woman, who do not show any apparent signs of a certain inherited disease, have seven children (2 daughter and 5 sons). Three of the sons suffer from the given disease but none of the daughters are affected. Which of the following mode of inheritance do you suggest for this disease?

A
Autosomal dominant

B
Sex-linked dominant

C
Sex-limited recessive

D
Sex-linked recessive

Solution

Sex-linked recessive inheritance is a mode of inheritance in which a mutation in a gene on the X chromosome causes the phenotype to be expressed in males (who are necessarily hemizygous for the gene mutation because they have one X and one Y chromosome) and in females who are homozygous for the gene mutation.
Question 2
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Pedigree analysis is study of particular traits in

A
Two generation only

B
Two species

C
A several generation

D
Two families

Solution

Pedigree analysis is the study of particular traits in several generation of a family. In this analysis, inheritance of particular trait is represented in family tree over the generation.
Question 3
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Which of the following genetic disease is autosome liked recessive trait?

A
Sickle cell anemia

B
Phenylketonuria

C
Colour blindness

D
Hemophilia

Solution

Sickle cell anemia is a autosome linked genetic disorder. This defect arises when both the parents are carrier of the gene that cause this defects.
Question 4
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Possibility of becoming hemophilic is extremely rare because mother of such female to be at least

A
Non of parent should be hemophilic

B
Hemophilic and father should be carrier

C
Both should be hemophilic

D
Carrier and father should be hemophilic

Solution

Possibility of becoming hemophilic is extremely rare because mother of such female to be at least carrier and father should be hemophilic which becomes unviable at the later stage of life.
Question 5
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Failure of cytokinesis after telophase stage of cell division results in the

A
Increase or decrease depends upon type of cell division

B
Decrease in the whole set of chromosome in organism

C
No change in the chromosome number

D
An increase in whole set of chromosome in organism

Solution

Cytokinesis is the division of chromosome. Failure of cytokinesis after telophase stage of cell division results in the an increase in whole set of chromosome in organism that leads to polyploidy.
Question 6
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Assertion: Turner’s syndrome is caused due to absence of one X chromosomes.
Reason: The female suffering from turner’s syndrome is sterile as ovaries are rudimentary along with other secondary sexual characters.

A
Assertion is incorrect but reason is correct

B
Both assertion and reason are correct

C
Assertion is correct but reason is incorrect

D
Both assertion and reason are incorrect

Solution

Turner’s syndrome is caused due to absence of one X chromosomes.
The female suffering from turner’s syndrome is sterile as ovaries are rudimentary along with other secondary sexual characters.

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Re-Attempt Weekly Quiz Competition

Principles of Inheritance and Variation Test - 16

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Principles of Inheritance and Variation Test - 16

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Rank

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SHARING IS CARING

Question 1

Autosomal dominant

Sex-linked dominant

Sex-limited recessive

Sex-linked recessive

Solution

Question 2

Two generation only

Two species

A several generation

Two families

Solution

Question 3

Sickle cell anemia

Phenylketonuria

Colour blindness

Hemophilia

Solution

Question 4

Non of parent should be hemophilic

Hemophilic and father should be carrier

Both should be hemophilic

Carrier and father should be hemophilic

Solution

Question 5

Increase or decrease depends upon type of cell division

Decrease in the whole set of chromosome in organism

No change in the chromosome number

An increase in whole set of chromosome in organism

Solution

Question 6

Assertion is incorrect but reason is correct

Both assertion and reason are correct

Assertion is correct but reason is incorrect

Both assertion and reason are incorrect

Solution

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